It is possible to display a PDF file directly in your page, without downloading it.
In order to do that, here are the steps:
First, you should upload your PDF file somewhere in the world wide web.. You can of course upload it to your wordpress website. Obtain the URL for it:
you will need to type the following:
[ iframe src = “paste-your-PDF-url-here” ] << remove the space after/before the square braket
and it will appear like this: