Malicious PDF — malware analysis report

Static analysis result for SHA-256 724d046311d1e34f…

MALICIOUS

PDF

70.8 KB Authoring application: OpenOffice Draw
MD5: 217bd47e6547134b7ef2372bfec66c18 SHA-1: ac0c46672996b60a1e3719c505ad13b3ea6f1c1f SHA-256: 724d046311d1e34f56d87fa1d79f332c648a1fe44380c132cd98823dd2e2ead9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The document body text is heavily obfuscated and does not provide clear instructions, but the heuristic firings strongly suggest a malicious intent related to link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kimshairitis.com/uploads/1/3/0/6/130605159/negijikijomufo_niboluxa.pdf
    • http://financewebtop.com/uploads/1/3/0/8/130814032/nirugepe_zekerixiwir_topogopep.pdf
    • http://significadodeemojis.com/uploads/1/3/0/6/130639797/fefin-mobane-joras.pdf
    • http://iot4d.co/uploads/1/3/0/6/130639093/4591475.pdf
    • http://myuntoldpleasures.com/uploads/1/3/0/2/130289632/8354459.pdf
    • http://metropolis-exc.com/uploads/1/3/0/6/130639533/vejamusimar_nazoti_nulozabotixinik_zubixebupoja.pdf
    • http://jgregoryfilms.com/uploads/1/3/0/6/130620578/digerafigej.pdf
    • http://new-england-marketing.com/uploads/1/3/0/4/130479513/af85294aa497.pdf
    • http://nataliyatodorportfolio.com/uploads/1/3/0/5/130588337/151322db180.pdf
    • http://plantandsoiltreatment.com/uploads/1/3/0/3/130323207/fidigego-povezadirifawig-worinobi.pdf
    • http://schmittwoodworkingllc.com/uploads/1/3/0/4/130483546/titax_pamepe_rulozinegus.pdf
    • http://baseballtoolkit.com/uploads/1/3/0/6/130620313/3180398.pdf
    • http://dominikvizesi.com/uploads/1/3/0/4/130435972/lumosipep-kuregiwi.pdf
    • http://www.scottish-airport-transfers.co.uk/uploads/1/3/0/7/130775440/130775440.html#types+of+audio+visual+aids+in+teaching+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002efc.bin
a72de938fba48af7c7359d2bdb127dae3bbd115f15ae318f899c56d598a9d734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFC 8724 bytes

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