Today, I would like to promote a best practice via a small Python module that is very helpful when you’re dealing with suspicious or malicious URLs. Links in documents are potentially dangerous because users can always click by mistake on them. Many automated tools and scripts are processing documents to fetch links. Even if the original document does not provide dynamic links, many applications will detect them and change them to real links. Clicking on a link could not only affect the security of the user/computer but it could also leak data or pollute statistics. A good example is the kill switch domain of WannaCry that was linked in many articles by journalists a few weeks ago.