URLs copied from Google search results (such as links to PDFs) are more complicated than they need to be. This tool removes the unnecessary parts, leaving the page's original URL.
This can possibly be cleaned further, leaving the following URL.
An alternative method that can be sometimes be used directly from the Google results page: click the down-arrow beside a green address, then choose Cached (if this option appears). A clean link should appear at the top of the page. There are more suggestions on Lifehacker.