Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4aa6be5756f0b5…

MALICIOUS

PDF

33.5 KB Authoring application: Serif PagePlus
MD5: 50c5d8d4625478ad39a568e9ec2bfa64 SHA-1: 713902271f98ee68f06e30d577b0fb3dfa80820a SHA-256: cb4aa6be5756f0b52ba4ff193fd8675d26fcf9da43e34bc44189540f24cb3473
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of embedded external links, characteristic of a link farm or SEO poisoning attack. These links likely lead to phishing or malware distribution sites, aiming to lure users into clicking them. The document body contains text related to grammar quizzes, which appears to be a lure to disguise the malicious intent.

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://betterbartlett.org/uploads/1/3/0/7/130776692/sipebelij.pdf
    • http://bloomandbeyond.com/uploads/1/3/0/7/130739744/faminotijow.pdf
    • http://oasisgaminginc.com/uploads/1/3/0/6/130604332/kagewejipafinolegime.pdf
    • http://tokeplusherbs.com/uploads/1/3/0/8/130813740/6bd63d6c.pdf
    • http://amysbargainoutlet.com/uploads/1/3/0/4/130435715/xibuvafekodotez.pdf
    • http://staceysdeliclt.com/uploads/1/3/0/6/130639629/lezelitomubonuwovov.pdf
    • http://parkcityshuttlecompany.com/uploads/1/3/0/5/130589229/92e3a95986a6.pdf
    • http://onestoneworks.com/uploads/1/3/0/8/130874025/zuxazuxoj-fepubiderisan-votuwamubume-zopomumugunuji.pdf
    • http://dtailspetboutiquespa.com/uploads/1/3/0/3/130313299/5392827.pdf
    • http://springflowerbookkeeping.com/uploads/1/3/0/5/130590338/besuxuzidije.pdf
    • http://lilylives.org/uploads/1/3/0/7/130739155/4580316.pdf
    • http://anusaf.com/uploads/1/3/0/3/130379287/fefudapibin.pdf
    • http://bigcreekgreenway.org/uploads/1/3/0/5/130540197/e29d3a08dd0c300.pdf
    • http://aascapedesign.com/uploads/1/3/0/5/130539188/vetite.pdf
    • http://topendtour.com.au/uploads/1/3/0/7/130739607/725551.pdf
    • http://gocrunchy.org/uploads/1/3/0/7/130739227/gesutenukusuna_juzojuji_zasuzoresuw.pdf
    • http://sta-66-99-58-220.ladse.org/uploads/1/3/0/4/130483213/130483213.html#grammar+test+past+tense

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000025eb.bin
9a448e7ffe5ba96785989a650215cef2fe06b86d948fef39e20c5f554848242c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25EB 8268 bytes

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