Malicious PDF — malware analysis report

Static analysis result for SHA-256 355cbac89157663f…

MALICIOUS

PDF

37.5 KB Authoring application: pstoedit
MD5: 9e49fb85a6e3b944d2b1d19fe19d76b2 SHA-1: 9df51ccfee318231ca2171d0265c1e8c8920e691 SHA-256: 355cbac89157663fb883420c63adda21c25c78dc55006c9e669ea9bdc696b99a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a machine learning classifier. The primary heuristic identified a large number of embedded external links, with the first being http://tedoxedege.trustevroservis.ru/uploads/2020/01/28/243f249aa59d1a.pdf. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://tedoxedege.trustevroservis.ru/uploads/2020/01/28/243f249aa59d1a.pdf
    • http://my.miquos.network/uploads/1/3/0/6/130622103/nitebedawidaj_samesifoxuz_zisuzigadolekof.pdf
    • http://motherhoodmomentstowineabout.com/uploads/1/3/0/2/130271043/321435.pdf
    • http://liquorlawsvt.com/uploads/1/3/0/5/130540208/9169729.pdf
    • http://exocognitive.com/uploads/1/3/0/2/130288386/vavipoxurejol-kegakeme-notimoworak-zujenexetodit.pdf
    • http://menthings.net/uploads/1/3/0/2/130272505/zirojez-gakax-kagobavapi.pdf
    • http://pamelagallagher.com/uploads/1/3/0/6/130620601/kumaxoreraxulexe.pdf
    • http://absoluteventoparty.com/uploads/1/3/0/4/130483833/394346.pdf
    • http://carepackagesrus.org/uploads/1/3/0/5/130544968/lorasedowimi_vitumuxuwob_tonixobevozik.pdf
    • http://doubleeroofing.org/uploads/1/3/0/5/130590710/688588.pdf
    • http://northwestuu.com/uploads/1/3/0/2/130289198/130289198.html#breath+of+the+wild+great+fairy+fountain+locations

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012db.bin
c53b447c85bc14974f8687c5cc692643d5cc2944abf95ccc8af79a95d594f92c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB 7640 bytes

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