checking a.pdf
PDF Version: 1.3
R = 2
P = -60
User password = 
extract for accessibility: not allowed
extract for any purpose: not allowed
print low resolution: allowed
print high resolution: allowed
modify document assembly: not allowed
modify forms: not allowed
modify annotations: not allowed
modify other: not allowed
modify anything: not allowed
File is not linearized
No syntax or stream encoding errors found; the file may still contain
errors that qpdf cannot detect
