The template you started from
Most CVs begin as someone else's file. The original author's name often stays in the document properties through every subsequent edit, which means your CV can arrive attributed to a stranger, or to the friend who sent you the template.
Every version you have sent
People tailor a CV per application. If the file is a PDF exported repeatedly from the same document, or a Word file edited in place with tracked changes on, the earlier tailoring can still be in there — including salary figures, other companies' names, and lines you removed because they were not true any more.
Timestamps tell a recruiter when you started looking
The creation and modification dates are readable by anyone. A file modified at two in the morning on a weekday, or created the day after a bad performance review, is a piece of information you did not intend to hand over.
The safest export path
Finish the document, run the checks, then export a fresh PDF rather than editing an old one. Clean it, and confirm with the tool above that the author field is empty before you attach it.