You can use the <embed>
tag with the source of the file in the src
attribute. This uses the native browser PDF viewer.
<embed src="your_pdf_src" style="position:absolute; left: 0; top: 0;" width="100%" height="100%" type="application/pdf">
Live example:
<embed src="https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf" style="position:absolute; left: 0; top: 0;" width="100%" height="100%" type="application/pdf">
_x000D_
Loading the PDF inside a snippet won't work, since the frame into which the plugin is loading is sandboxed.
Tested in Chrome and Firefox. See it in action.