If you ever need to find out which has been used in a PDF,
website hosting or image, I found a very helpful web site hosting which can identify then for you.
http://www.myfonts.com/WhatTheFont/
You simply take a screenshot of the font or use a previous image, upload it to the server and it gives you options of all the fonts it could be. So far it's been extremely accurate for when I've used it!
It's a very hand tool as well when someone doesn't have an electronic version of their logo and it contains text. Most people have no idea what the font is and this way it allows you to build the logo up again, matching the hard copy version.