url(r'^files/(?P<path>.*)#page=[(?P<page_num>d+)]$', serve, {'document_root' : settings.MEDIA_ROOT}, name='file_url')

<object id="pdf" width="100%" height="900" data="{% url 'knowledge_manager:file_url' document.ref_file.name document.last_open_page %}" type="application/pdf" >
  </object>