Get PDF from another site

Hi,
does anyone know how to get a pdf file from another site?
Width cfhttp I am able to obtain the content of the pdf but when a try to write it

<cffile action="WRITE" file="#myFileName#" output="#CFHTTP.FileContent#">

on my pc I obtain a not readable PDF file.

Same result width

<cfdocument FORMAT="pdf">#CFHTTP.FileContent#</CFDOCUMENT>.


Can anyone help me, please?
Bye