Arquivo danificado

Hi @Professora Ya309533291qjn 

Hope you are doing well and thanks for reaching out.

PDFs often get corrupted if they are created using software that’s incompatible with Adobe Acrobat. However, several other causes exist, such as a file not downloading fully, insufficient hard-drive space or, in some cases, a virus infection.

If a PDF file won’t open on Adobe Acrobat, ensure you have the latest version of Acrobat installed Go to Help > Check for updates and reboot the computer once. You may also try, disable protected mode at startup - you can do this by heading to Edit > Preferences > Security (enhanced). On that final screen, head to sandbox protections and untick Enable protected mode at startup. If you’re not getting a corrupted file error warning and the file just doesn’t open, this is your best option.
Note: Please turn on the security after testing to avoid any security issues

For more info about repairing the damaged PDF please check the help page https://www.adobe.com/uk/acrobat/resources/repair-pdf.html

Regards

Amal