71–80 of 165 posts
A good way to enable delivery tracking for PDFs over messenger, I guess!
While I don't like FB this is not something related to PDF, they provide quick preview for all links like almost all social networks
This should not be news to anyone. Facebook scans all links posted in Messenger.
This is links INSIDE a pdf. Thats one step further than most people assumed.
You gotta assume they will reconstruct generations of your family tree if they can from your chat history.
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Worth noting WhatsApp also provides link previews now. Although it is supposedly e2e communication, the link previews are likely generated by reaching out to a similar facebook unfurl service. They can then have a single map of phone num -> links rendered between fb and whatsapp.
WhatsApp fetches a link preview on the sender's device before the message is encrypted, and packages it up with the message before sending. Depending on how exactly they implement the fetch, they may or may not know what links you sent.
This should not be news to anyone. Facebook scans all links posted in Messenger.
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Couldn't you sort of test this by enabling E2E, sending a link that was previously blocked, and seeing if it is still blocked? That would at least show some sign if it's all a sham or not.
That would guarantee absolutely nothing.
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What if I create a PDF with this content... https://news.ycombinator.com/item?id=1 https://news.ycombinator.com/item?id=2 https://news.ycombinator.com/item?id=3 and so on, until 10,000,000? Perhaps Facebook starts opening every link using 10,000 parallel threads. Can you really replicate that from your connection at home? Perhaps even the sysadmin of your victim site has whitelisted all Facebook IP addresses so their…
There's a fair chance the service which generates these outbound requests throttles itself, both with respect to how many requests it makes against any one domain/IP, or how many errors it will provoke per time period, or before human review.
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The cost of uploading a PDF of links is probably not much less than the cost of following those links on your own. So I don't think you gain much by leveraging Facebook in this case.
What if I create a PDF with this content... https://news.ycombinator.com/item?id=1 https://news.ycombinator.com/item?id=2 https://news.ycombinator.com/item?id=3 and so on, until 10,000,000? Perhaps Facebook starts opening every link using 10,000 parallel threads. Can you really replicate that from your connection at home? Perhaps even the sysadmin of your victim site has whitelisted all Facebook IP addresses so their…
And if they didn't the headline would read: "Facebook fails to stop malicious and illegal content from being shared on their Network! Should they be shut down?!"
And if they didn't the headline would read: "Facebook fails to stop malicious and illegal content from being shared on their Network! Should they be shut down?!"
If we'd be talking really malicious stuff like chid pornography then in the context of filesharing these companies already have systems in place to distinguish content, so blanket banning of torrent files seems blatantly unnecessary.