Why doesn’t CDR detect the JavaScript I appended to a PDF file?

Cause

If the JavaScript-containing objects are added to the PDF but the Xref (Cross-Reference) table is not updated accordingly, CDR will not detect them.

• The Xref table is crucial for referencing valid objects in a PDF.
• Objects missing from the Xref table are considered garbage data and will be removed by the CDR engine.

Solution

To ensure that JavaScript in a PDF is detected by CDR:

1. Update the Xref Table:

• When adding JavaScript, ensure that the corresponding object is correctly referenced in the Xref table.

2. Follow PDF File Structure Specifications:

• The JavaScript should be stored in a properly structured and up-to-date object within the PDF.

Conclusion

For JavaScript to be recognized in a PDF by CDR, it must be placed in a valid object that is correctly indexed in the Xref table and complies with the PDF file structure specifications.