It certainly can be done with Adobe Acrobat, but that isn't free. Maybe other pdf-editors also have the option.
An interesting alternative that you might want to research is the open source pdf-toolkit: http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/
I have some pdf files that I want to protect from being printed or edited. Can someone suggest me a free tool which I can download for complete protection? I did not get any suggestion from my search so I think you will help me in this discussion forum.
Thanks and Regards