Crystal Report Designer ver.9 is not exporting the report to PDF in Windows 7.
If the Crystal Report Designer is not reporting to PDF, then I recommend checking the code on the CodePlex. There is a sample code and application you can implement with the Crystal Report Designer to enable PDF output functionality. Access the link below to read more and download the sourcecode files.
CodeProject link: http://www.codeproject.com/Tips/716161/How-to-Export-Crystal-Report-on-Button-Click-in-to