How to run a php script which contains a pdf

[Nigel Henry]

I was trying to read an online tool catalogue, and noticed a PDF button at the 
bottom of the webpage. Clicked on it, and it opened the dialog box to 
download. What has been downloaded though is a .php script (27.3MB).

The properties shows that it contains a pdf document, but I've no idea how to 
run it, open it, or whatever needs to be done, to get to see the PDF.

Any suggestions folks.

Nigel.