diff --git a/malware-analysis_ref_and_memo.md b/malware-analysis_ref_and_memo.md
index 22b9d1b..9da7f2c 100644
--- a/malware-analysis_ref_and_memo.md
+++ b/malware-analysis_ref_and_memo.md
@@ -26,7 +26,7 @@
 # C2 Analysis
 ### Ursnif
 - Ursnif(version 2)のc2通信の仕組みと復号ツールについて<br>
-[Writing Malware Traffic Decrypters for ISFB/Ursnif](https://labs.sentinelone.com/writing-malware-traffic-decrypters-for-isfb-ursnif/)]
+[Writing Malware Traffic Decrypters for ISFB/Ursnif](https://labs.sentinelone.com/writing-malware-traffic-decrypters-for-isfb-ursnif/)
 
 # Binary Analysis
 ### Symbolic Execurtion