Newb Help: Trying to download a PDF file from URL

Sorry, such a trivial question, but I am python newb and having issues.

I need to download the file so I can automate an internal process.

Example URL:
Department of Defense (DoD) Warning and Consent ~ DIBBS

Can anyone offer any assistance? I know it is not a simple download, as there are cookies and such involved.

I appreciate any help in advance.