We have found 3 software records in our database eligible for .pdf to .ai file format conversion.
The only reliable PDF to AI conversion is possible only for full PDF files saved in the original Adobe Illustrator using the 'save for editability' option.
Any other PDFs will not be imported properly and thus cannot be edited, as Illustrator is not a general-purpose PDF editing tool. It may also be possible to do it in other software that supports Illustrator formats (like CorelDraw), however nothing beats the original.
Updated: October 31, 2016
The latest version, Illustrator CC is available through the new Adobe Creative Cloud suite. The previous version was Illustrator CS6.
A set of tools for graphics designers. With CorelDraw Graphics Suite designers can create vector illustrations, page layout, brouchures, web sites, retouch photos, convert bitmap images and vector images. CorelDraw Graphics Suite is available only for Microsoft Windows.