Hi,
I am trying to open PDF file from a link in ArcGIS Online. Configure the Pop-up as a custom attribute display. 
I also configure the IIS folder where the PDF files are stored.

The columns from the layer and the PDF files have the exact same name but when I click on the link of the pop-up

The link open in a new page but I got a blank page, not the pdf.

What im doing wrong, do I need to configure something else?
Thanks for your help!
Diego Llamas