@geothermusa
The following is one possible solution:

You will need to make use of the action Run VBScript to execute the following code:
Dim Excel
Dim ExcelDoc
'Opens the Excel file'
Set Excel = CreateObject("Excel.Application")
Set ExcelDoc = Excel.Workbooks.open("%ExcelFile%")
'Creates the pdf file'
Excel.ActiveSheet.ExportAsFixedFormat 0, "%OutputPDFFile%" ,0, 1, 0,,,0
'Closes the Excel file'
Excel.ActiveWorkbook.Close
Excel.Application.Quit
Do remember to use the action Set variable to assign the full path of your Excel file to %ExcelFile%, and to assign the full path of the output PDF file to %OutputPDFFile%.
To learn more, please visit VBScript snippets (werkbook.co)