.txt or .md : Look for a "Readme" file. This will usually contain the specific guide or instructions written by the file's creator.
Before opening any file with a randomized name, perform these security checks: dFwbWJbcvtiwiGwbQ0nB.zip
Select (Windows) or use a third-party tool like 7-Zip or WinRAR. Inspect the file extensions inside the extracted folder: dFwbWJbcvtiwiGwbQ0nB.zip