All you needed to do is use the HTML tag “img src = “ and insert the link to the pdf document.
Really?
I don't think so.
Here ya' go;
What do you see? And empty box.
Right click on that, select 'view image info'.
In this instance, it is the web address of the pdf, which is (without coding to make a link)
http://www.wacobikerjustice.com/wp-content/uploads/2015/09/ccasupp.pdf