Splitting multiple files at once

I supervise the marking of exams completed in pdf writable documents.  Each "marker" is assigned a set of questions to mark e.g. Q1-4 to marker 1; Q 5-8 to marker 2 etc.  There are 60 candidate papers.  I know how to split the pdfs to create new files of each section, but can I do this as a bulk lot and not have to do it individually for each paper?  I tried a dummy run choosing the mutlple files option but it didn't work.  Only split one of the files.  Thanks.