Hey IDR!

There is a variety of applications that can do it for you. You can just search for PDF Editors on google.com and you'll find a lot of results.

The one I used in the past and found particularly handy was the Adobe Acrobat (Adobe - Adobe Acrobat family: Create PDF file, edit PDF file, convert PDF to word, convert PDF to doc), but I'm sure you can find different programs at much cheaper prices (i.e. Edit PDF Files with *the* PDF Editor - Free Download).

Bottom line; get a PDF Editor

Hope this helps!