Fun way to find random documents. Go to Google search, and search for
Feel free to replace the word "the" with any other innocuous word. You'll get a bunch of random PDFs.
Another fun constraint:
filetype:pdf site:org the
This will return PDFs by ".org" domains (mostly nonprofits) so you get a bunch of random reports.
filetype:pdf "internal use only"
Seeing arguments around copyright and DRM, I want to be clear about this:
I absolutely do want artists to get paid so they can continue creating great works, but not at the cost of our software freedom. Not at the cost of pushing people to install proprietary software (DRM) attempting to block certain actions.
If you distribute entirely with DRM you won't get my money, attention, or word-of-mouth. And I encourage others to do likewise.