When I use the PDF "printer" here it asks me for a file name

Instead of looping to add WS to a PDF file, I was able to select multiple sheets and print them all to a file.

As an experiment, you could start to record a macro, select all your sheets (control+click) at once, and then File, Print selecting your PDF printer.

I got the code fragment in my earlier answer, and guessed at how your macro might look.

[vba]
Worksheets(Array("Information", "IPL Service", "Signatures and pricing")).Select
ActiveWindow.SelectedSheets.PrintOut Copies:=1, ActivePrinter:="PDFCreator", Collate:=True
[/vba]