Track who opens a PDF?

Hello, I need to provide PDFs to a client, and they need a simple method to track who
opens the PDF in case an employee sends the PDF outside the company. All they want is
the IP address of the user.

The client’s IT department won’t let us use PDF plug-ins.

Something as simple as a web beacon would be so nice!

Can anyone please suggest a solution to me???

Thanks!!!

Customer
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VeryPDF DRM PDF Protector has a function to track who opens a PDF file, after a user open a PDF file, you will see following log message in the real time report,

VeryPDF DRM PDF Protector is free for personal use, you may download and test the software from this web page,