If any user share any file from One Drive for Business then can admin get logs or track of the files which he is sharing.

• Yes, There is way to generate audit report for  Onedrive for business .
• Go to  https://protection.office.com & Click on Search & investigation > Click on Audit log search and right side select Sharing and access request activities.
• Only latest 90 days activity report available here 

or 

Use the Office 365 Audit log search page to start recording user and admin activity in your organization. After Office 365 prepares the audit log, you can search it for a broad range of activities including uploads to OneDrive or SharePoint Online or user password resets. Note that mailbox auditing is set up separately.

• Start auditing and search the Office 365 audit log

  • Intro

  • Before you begin

  • Search Audit Log

  • Audited Activities