title: How to get rid of the red box around hyperlink in PDF?
body: <p>I have a pdf file obtained from the network and it has red boxes around links.  </p>
  
  <p><a href="https://i.stack.imgur.com/nLDL8.png" rel="noreferrer"><img src="https://i.stack.imgur.com/nLDL8.png" alt="enter image description here"></a></p>
  
  <p>How can I get rid of them? 
  How can I view the document without them?</p>
  
  <p>P.S. 
  Something that I found:</p>
  
  <ul>
  <li><p>pdf is probably generated by latex,</p></li>
  <li><p>non-commercial software is limited in modifying the document.</p></li>
  </ul>
  
  <p><strong>Update</strong>:</p>
  
  <p>Facts disagree with the opinion that only author can change the way pdf looks. Below is an example of the same document in google chrome.</p>
  
  <p><a href="https://i.stack.imgur.com/2kggG.png" rel="noreferrer"><img src="https://i.stack.imgur.com/2kggG.png" alt="enter image description here"></a></p>