In order for the Vault job processor to automatically create PDF files with the revision number/letter appended to the end of the file, you need to edit a config file on the machine that is running the Job Processor.
First, you need to make a copy of the JobProcessor.exe.config file located in the <install dir>\Vault Professional 2018\Explorer folder. Use a text editing software, such as Notepad, to open and edit the file.
Add the following line before </appSettings> towards the bottom of the file:
<add key="DesignRepresentation.Naming" value="\.(dwg)$/<_name_>-<Revision>"/>
This will add a file 1234-A.PDF from a drawing 1234.DWG
Change the (dwg) to (idw) in the line of text if this is for IDW files.
Note: Only 2D PDF files are created from the Job Processor.