There are a few software conflicts that can exist with PDF software. The PDFs are not populated by default because Adobe implemented a new security feature to prevent certain PDF properties from displaying, as they could contain malicious content.

This article will show you how to stop the Chrome web browser from automatically opening PDF documents.

Instructions 

1. Click Actions Menu > Settings
   
2. Scroll down and click Privacy and Security 
   
3. Click Site Settings 
   
4. Under Additional Content Settings click PDF documents
   
5. Toggle On the option Download PDFs instead of automatically opening them in Chrome