The Excel Method: Columns, Formulas, and a Rename Command
The classic version looks like this. Open Excel and list every current filename in one column, exactly as it appears in the folder. In the next column, type or build the new name you want for each file. A formula such as =CONCAT("ren \"", A2, "\" \"", B2, "\"") turns those two columns into a ready-to-run command line for every row. Copy the whole result into a plain text file, save it with a .bat extension, and double-click it inside the same folder as your PDFs. Windows runs each line as a rename command, one after another, and the job is finished in seconds.
This is the workaround threads on Reddit, Microsoft's own Q&A forum, and a handful of Alteryx and Apple Discussions posts all land on when someone asks how to rename a pile of files using a spreadsheet list. It works. It's also entirely manual to set up, and it stays that way every time the folder changes.