Encontrei a solução neste tópico: link
tell application "Finder" to set s to selection
set r to "\"{\rtf1"
repeat with i in s
set t to "Download " & name of i
set p to POSIX path of (i as text)
set sed to "echo " & quoted form of p & " | sed s_/Users/0/Dropbox/Public_http://dl.dropbox.com/u/DBid_"
set l to (do shell script sed) & "?dl"
set r to r & "{\field{\*\fldinst{HYPERLINK \"" & l & "\"}}{\fldrslt \"" & t & "\"}}\par "
end repeat
set r to r & "}\""
do shell script "/bin/bash -c 'echo " & r & " | pbcopy'"