Finding QR codes in PDF

[cleitongoncalves]

Hello everyone, i am trying find QR codes into a pdf, i kwon that exist a verify in preflight that search for barcodes, in description of one this verify, exist one that, probably, search for codes type QR , but i can't make this works, somebody can help me, here the verification. 

[Abambo]

The best is always to start with an example file, that you possibly did create. Where did you get the file that you are searching for? Can you manually locate the QR code? If so, can you share the PDF file (given that no private data is contained)?