To get started, install the required dependencies:
$ pip install -r requirements.txt
Then, run the script:
$ python extract_pdf_metadata.py Chapter_2_Building_Malware.pdf
{'author': '',
'creationDate': None,
'creator': '',
'encryption': None,
'format': 'PDF 1.4',
'keywords': '',
'modDate': None,
'producer': 'Skia/PDF m110 Google Docs Renderer',
'subject': '',
'title': 'EHWP - Chapter 2',
'trapped': ''}