Prevent Direct Access to pdf file? php, wordpress

Question

How can i prevent direct access to my pdf file in wp-content/upload/woocommerce_upload folder

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^https://(www.)?domin.com/wp- 
content/uploads/woocommerce_uploads/2020/01/.*$ [NC]
RewriteRule \.(pdf|jpe?g|png)$ - [F]

Its not working please help

Answer 1

why not use this?

<FilesMatch "/wp- 
content/uploads/woocommerce_uploads/2020/01/.*\.pdf$">
   Order allow,deny
   Deny from all
</FilesMatch>

Answer 2

I think this should help: https://httpd.apache.org/docs/2.4/mod/core.html#files

it should be something like:

<Files "yourfilename.pdf">
Require all denied
</Files>