Authorities seized hard disks and documents from a sport-related unit of the Samsung-owned agency in connection with the influence-peddling scandal involving the country's president.
Investigators aim to determine whether staff routinely worked beyond the legal overtime limit.
The investigation aims to gain a clearer understanding of the agency's working culture.
AUSTRALIA - SC Johnson engaged UrsaClemenger to develop an integrated campaign to promote its Raid One Shot range of insect sprays.
ASIA-PACIFIC - Draftfcb is feeling the effects of losing its SC Johnson account in July, announcing plans that it will be cutting jobs in Asia by around 3 per cent.
Top news, insights and analysis every weekday
Sign up for Campaign Bulletins