This is a text file employing the 'Right-to-Left Override Attack' to appear to be a PDF file on windows.
The file name contains a unicode char (u202E) which flips text right to left. The file name is set to be What_Type_Of_File_Is_This_pdf_or_[u202E]fdp.txt
On windows as the OS renders the unicode character correctly to flip the direction of subsequent characters, this file appears in Explorer as What_Type_Of_File_Is_This_pdf_or_‮fdp.txt
In this instance it was a txt file, but could easily be an exe with a PDF icon to complete the deception and perform a real attack.
