Kedah Customs Department deputy director Mohd Noor Yusoff said the drugs were worth RM446,880 in the market.
The 34-year-old woman was found carrying two compressed packets of syabu weighing 2.352kg in a hidden compartment in her backpack.
"We believe she's acting as a mule to distribute it in Penang," Mohd Noor told a press conference here Friday.