Copy of file without permission

Dear All,
I need some help on weired thing happed today.

We have one process which unzip and copy the file on one location

The zip file will be

abc123_xyz456_pl_20140805.zip

The content inside the zip file would be

abc123_xyz456_pl_20140805.csv

The file will be copied to location

/file_loc/abc123/xyz456

The owner of the process, and directory xyz456 is same user1.
security Group is usrsgpr1.

The process was running good but today i see the transfer of

abc123_xyz456_pl_20140805.csv

to location

/file_loc/abc123/xyz456

but the file was not having any permission.

as below

---------- 1 user1 usrsgpr1 38475 aug 6 11:27 abc123_xyz456_pl_20140805.csv

Could you please help to understand what could be the reason? What could be wrong?
Other files are transferred with correct persmission but for one of the file this happened.

About process:
The process copy the zip file deposited by user on remote server (one of the shared unix drive), check the zip, copy the zip on tmp location if zip having no issue, then unzip the file anc copy the content on correct location.

It's not imposssible that the strange permissions came from the zip file itself. It does contain information on permissions, though often far from a complete UNIX user/group/world specification. unzip would appear to have no way to turn that off, though it does have a way to control whether sticky bits are included.

Is this process a script? Can you show us the listing from it?

You can list the file permissions inside the zip file with

zipinfo abc123_xyz456_pl_20140805.zip

For safety, you can give yourself read permission after extraction

chmod u+r *.csv