Just because the visible footer gets removed doesn’t mean there isn’t other unique tracking information hidden deep in the PDF that could still get the lawyers sicced on you. Depending on how valuable this information is to the company, and how litigious they are, you have to judge how far they might’ve gone and might yet go to protect it.
Unfortunately, that’s why this kind of copy protection can an actually be an effective tactic to prevent individuals from sharing their copies. While there might be ways to strip this kind of hidden data on simpler PDFs… even resorting to methods like screenshotting or printing and scanning, still cannot give you absolute confidence that there isn’t some subtle unique identifier invisibly hidden in the layout or through subtle inconspicuous variations, especially if you’re doing this regularly and they start targeting you and your account for identification. And on complex PDFs there are so many more ways they could hide this information digitally if they know where to look for it and you don’t. 99% of the time it’s going to be pretty obvious to strip out, but are you willing to take that risk even if you do find a technical method of removing the visible footers? If it’s a one-off, maybe you can get away with it, but in the long term this strategy is not viable and is a trap for rookies.
The only truly safe way to share digitally watermarked content like this is to buy it with a burner account and full opsec in the first place. Nobody to sic lawyers on if it’s a hacked paypal or a stolen/prepaid credit card or an untraceable email and IP, or in a jurisdiction with no enforcement. Smash and grab, get the data anonymously and get out. Don’t share stuff from your personal account that’s literally got your name and banking information attached to it unless you can confirm it’s bit-for-bit indistinguishable from other innocent copies with something like a checksum.
Yeah but it’s still of some value. He can’t redact history any more than he already has, as much as he might like to, and it prevents him from changing his story and redaction strategy in the future. This is how you start to back a liar like Trump into a corner he cannot escape from. Eventually his lies will catch up with him, efforts like this will make sure of it.