This is not a tex question per se, but I think it is not totally off-topic either. I heard a while ago, that when one creates a pdf, besides its content a pdf can also store some meta-information (for example the name of the user that created the pdf, the program with which it was created etc.), similar to ID3-tags (I believe they're called).
Is this true ?
If yes, is there any way to edit this information ?
EDIT: I'm sorry, my explanation weren't good. I meant editing the pdf without having its source tex fil (so using hyperref won't apply).