PDF Ebook File and Affiliate Cookies

I have a new ebook that is a free givaway for a few of my web sites. Im looking for someone that may know how I can if possible drop 2-4 affiliate cookies on the people that open that pdf ebook? I normally email it to them as a pdf file. I guess I could upload it and have them use a password to open it if that may open up some options.

If you have such knowledge and would care to either share the knowledge or just do it for me let me know. I will compensate you for your time.

Uncontrol cookie stuffing is bad , it could lead you banned , just viral your free book .. would be good already