Adding block to the specific content
The easiest way is with a View.


Create a new view
Disable the Page that will be checked by default.
The view should take as argument the Node ID. 
Also add a filter based on the content type
Then in the view, add the fields you want (File, PDF)
On the top (+ Add next to Master), you need to add a display as a block


Now, you go to /admin/structure/blocks and add the block. Filter it by Content Type.

:) 

Views module - https://www.drupal.org/project/views