Make sure to install the requirements first:
$ pip install -r requirements.txt
After that, you can edit the file_pages list in split_pdf_pages.py script, in split_pdf_ranges.py script to split the PDF file into the desired pages or ranges.
$ python split_pdf_simple.py Chapter_2_Building_Malware.pdf$ python split_pdf_pages.py Chapter_2_Building_Malware.pdf$ python split_pdf_ranges.py Chapter_2_Building_Malware.pdf