/usr/share/zsh/functions/Zftp/ is in zsh-common 5.1.1-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/zsh/functions/Zftp/zfanon
/usr/share/zsh/functions/Zftp/zfautocheck
/usr/share/zsh/functions/Zftp/zfcd
/usr/share/zsh/functions/Zftp/zfcd_match
/usr/share/zsh/functions/Zftp/zfcget
/usr/share/zsh/functions/Zftp/zfclose
/usr/share/zsh/functions/Zftp/zfcput
/usr/share/zsh/functions/Zftp/zfdir
/usr/share/zsh/functions/Zftp/zffcache
/usr/share/zsh/functions/Zftp/zfgcp
/usr/share/zsh/functions/Zftp/zfget
/usr/share/zsh/functions/Zftp/zfget_match
/usr/share/zsh/functions/Zftp/zfgoto
/usr/share/zsh/functions/Zftp/zfhere
/usr/share/zsh/functions/Zftp/zfinit
/usr/share/zsh/functions/Zftp/zfls
/usr/share/zsh/functions/Zftp/zfmark
/usr/share/zsh/functions/Zftp/zfopen
/usr/share/zsh/functions/Zftp/zfparams
/usr/share/zsh/functions/Zftp/zfpcp
/usr/share/zsh/functions/Zftp/zfput
/usr/share/zsh/functions/Zftp/zfrglob
/usr/share/zsh/functions/Zftp/zfrtime
/usr/share/zsh/functions/Zftp/zfsession
/usr/share/zsh/functions/Zftp/zfstat
/usr/share/zsh/functions/Zftp/zftp_chpwd
/usr/share/zsh/functions/Zftp/zftp_progress
/usr/share/zsh/functions/Zftp/zftransfer
/usr/share/zsh/functions/Zftp/zftype
/usr/share/zsh/functions/Zftp/zfuget
/usr/share/zsh/functions/Zftp/zfuput