Making Password Protected PDFs using Excel Vba and PDFtk Tool

I am using excel to process salary. I have one sheet for Salary Data and other Sheet for Salary Slip. I am using Vlookup function for making salary slips.

Right Now, I change one value (on which vlookup is based) and it gives the numbers related to that salary slip. Then, I save that salary slip in other file with a password and mail it to others.

Now I basically need VBA for printing salary slip to pdf file with a password. I will be giving the password for each employee which will remain same for all times. And if possible I can directly mail the file to employee email using excel.

Can you help me with this.

Thanks
Mohit