It's not clear how you're accessing the file. Many browsers now come with a facility to view pdf files within a web page and many people make the mistake of going to File > Print (or using Ctrl P) from their web browser, which typically results in a blank page being printed. The trick required is to look
within[i the web page for a printer icon and to click on that. (In some cases there's no printer icon immediately visible but hovering your cursor towards the foot of the screen brings up a floating panel which includes one).
As Alice suggests, it's often best to save a pdf file to your hard drive and then open it separately, so that you can print it from there. If you're having problems using Adobe's software (which is horrid anyway!), simply switch to using a [i]decent] pdf viewer. My own preference is for Sumatra PDF:
http://www.sumatrapdfreader.org/free-pdf-reader.html
but Foxit is probably the most popular alternative to Adobe Reader:
http://www.foxitsoftware.com/Secure_PDF_Reader/
(There's absolutely no reason whatsoever to have Adobe Reader on your computer at all. It's bloated, non-user-friendly and prone to virus attacks. The very first thing I did when I got this computer was to get rid of the pre-installed Adobe Reader!)