I tried this solution
but it didnt work

You can easily embed a PDF without using any plugin at all, use HTML object tag instead.

1. In Enfold, create a “Text Block” element
2. in the editor, input the code in the “text” fane, not in “visual” mode
3. syntax is: <object data=”http://path/filename.pdf” type=”application/pdf” width=”100%” height=”850px”></object> where you can of course adjust width and heigth as you please.

The result is not the same in all browsers, and it also depends on the way users have configured their browsers, but this is a robust, standard solution. I try to avoid using plugins whenever possible to avoid risk of future compatibility issues :-)