Malicious PDF — malware analysis report

Static analysis result for SHA-256 483c28775de95177…

MALICIOUS

PDF

65.8 KB Authoring application: Soda PDF
MD5: bdce9f122a7aa74d7a6baa8b0f42d256 SHA-1: c0a8c0944c83f7796684952b6232509c1197b7b1 SHA-256: 483c28775de95177dd124389e27f59f52f7639468b98f189fe8f29e959913906
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The embedded URLs and the document body, though partially corrupted, indicate a strategy to redirect users to a network of external PDF and HTML files. This suggests a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://guwu.design-interior.su/uploads/2020/01/28/9174316.pdf
    • http://mrssnydersclass.com/uploads/1/3/0/5/130588729/5601916.pdf
    • http://bangkokplasticsurgery.net/uploads/1/3/0/6/130621846/1668700.pdf
    • http://oakland-abyssinia-productions.com/uploads/1/3/0/6/130639613/zawofemusiwobupubobe.pdf
    • http://bejustalittlebetter.com/uploads/1/3/0/7/130738984/130738984.html#the+revolution+betrayed

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000112e.bin
370f87faa1bbfb15edc7002b8668c7269b3e7283ccef92255ed195277814bd0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112E 9088 bytes
font_01_sfnt_off0000bb7f.bin
448c4d4550ed59c7e8e80b6d66b986666620351883d23913e38401b861762e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7F 16368 bytes

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