PDF documents can be opened in CorelDraw just fine and used for making new drawings or publications, as well as new templates (.cdt). You can do that with the standard import PDF and Save as.. CDT functions in CorelDraw. No other program seems ot be capable of producing .cdt templates, so this is your only choice.
Convert Adobe Portable document format to CorelDRAW template file.
We found one software available in the database for this conversion.
Microsoft Windows software - convert pdf to cdt on Windows
A set of applications used by professional graphic designers
Convert from pdf file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.