Thank you for contacting us.
If you want to add the PDF links to your News item, the easiest approach would be to create a custom field:Custom fields
and you can store the link to the PDF in that field for that particular News item.
If I have misunderstood your request, please, get back to us with some additional information regarding the scenario and we will suggest a solution accordingly.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal
and vote to affect the priority of the items