How to Save PDF Docs opening in new Browser Tab

Hi All,
I am working on case where I user chrome Browser to Open my Portal. In the Portal have links to and I click on the Links and they open PDF docs in new Tab next the existing one. I need to download and save the PDF docs.

After PDF opened in next Tab2 , Control immediatly come back to Tab1 . It did not allow me to do any Actions in TAB2 and TAB2 URL is dynamic not static.

I tried Multiple Options listed below.
CTRL + 2 to stay TAB2 Active …did not work
CTRL + SHIFT + TAB to stay TAB2 Active …did not work
TRied to get URL link and used HTTP Activity – did not work.

Any help appreciated.