In Acrobat, go to Tools > Redact.
When you open a PDF file in Acrobat or Acrobat Reader, the following error message is displayed: “Insufficient data for an image.” The PDF opens, but the contents are either blurred or missing.
Do one of the following in Acrobat or Acrobat Reader:
The corruption of the PDF structure or improper tags, images, metadata might also cause the error. Follow the steps to sanitize the PDF:
In Acrobat, go to Tools > Redact.
In the Redact toolbar, click Sanitize Document.
In the Sanitize Document dialog box, do one of the following:
Select or deselect what information you want to remove from your PDF, click Remove, and then click OK.
Type a name for your file, choose location, and click Save.
The selected content is permanently removed when you sanitize PDF and save the file.
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