set mypath1 to POSIX path of "/Volumes/meinpfad/meinpfad/" 
set mypath2 to POSIX path of "/Users/meinpfad/meinpfad/" 
set the_files to (list folder mypath1 without invisibles) 
-- eine Schleife zur Ausgabe des Arrays in display dialog 
repeat with the_file in the_files 
	if ".pdf" is in the_file then 
		set myMove to mypath1 & the_file 
		set myResult to mypath2 & the_file 
		display dialog the_file				 
		try 
			move myMove to myResult with replacing 
		end try 
	else 
		display dialog "Nö" 
	end if 
end repeat 

set mypath1 to (choose folder) as Unicode text 
set mypath2 to (choose folder) as Unicode text 
 
set the_files to (list folder mypath1 without invisibles) 
repeat with the_file in the_files 
  if the_file ends with ".pdf" then 
    set myMove to (mypath1 & the_file) as string 
    try 
      tell application "Finder" 
        move file myMove to folder mypath2 with replacing 
      end tell 
    end try 
  end if 
end repeat