Hi, I never do that for pdf but I can give you some clue first of all, you have to decode your pdf file and save them.
Here a link to do that :
http://support.microsoft.com/kb/892730
Secondly you have to find a way to print this PDF file, I found some link who can help you with that:
http://vidmar.net/weblog/archive/2008/04/14/printing-pdf-documents-in-c.aspx