Is appending PDFs to each other possible?

I don't know if I'd need something else for this, but I want to write a script that runs once daily and fetches PDFs from an FTP directory.

The name is basically:
Would it be possible to merge all files with the same "n" into one PDF file when downloading, or would I need an outside tool and script for this?

Thank you for any advice. :)

WinSCP can append files. But you cannot append PDFs to merge them, afaik. And WinSCP cannot merge PDFs. You need another tool.

Yeah, today I read around a bit and found PDFtk which allowed me to do what I was set out to do. :) Thank you for replying!