Got a bunch of files you want to rename, but don’t want to go through them each one by one? Windows provides more ways to do this than you may realize.
You can employ many fixes to solve the problem of PDF links not working. For instance, correct the URLs if you have committed mistakes in doing that earlier.
You may need to convert your PDF to Word so that you can manipulate the document as a word document. Converting PDF to doc needs a reliable converter, as explained in this article.