Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfe5667da6ff997…

MALICIOUS

PDF

42.5 KB Created: 2020-08-17 10:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aea5e2942acd7966e729e6bbecd2b07b SHA-1: f76dc50207f732e5fc58485987c21cc50170754b SHA-256: 0dfe5667da6ff9976577b83dc762bbb57c764994da8a0e4362e1a8c4ef8f2f9e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=schneider+vfd+altivar+61+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to reference the same manual, suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links further indicates a link farm or SEO poisoning attempt, likely to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://ttraff.ru/pify?keyword=schneider+vfd+altivar+61+manual
    • http://files.bhgs.org.uk/uploads/1/3/0/8/130814229/3331135.pdf
    • http://wezenuwak.sharintebo.com/uploads/1/3/1/6/131606457/539ac66.pdf
    • http://lesuf.concertpixels.net/uploads/1/3/0/9/130969541/gopovuravomak-vegepuminanafif-nosojemuju.pdf
    • http://fonisajuv.hawthorneforge.com/uploads/1/3/1/3/131380213/kekawa-rudijiw-xulafapawatexin.pdf
    • http://tuxatate.tidewaterosa.com/uploads/1/3/1/4/131408899/b09f4250.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/niwafugugepomup.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/62067895979.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7640/files/guia_completa_de_calistenia_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/risapapigigodatusurixakuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7702/files/dusegopalofevum.pdf
    • https://cdn.shopify.com/s/files/1/0447/2619/0234/files/xivofagunuvitap.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/73718062104.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/bijemixubixotaripifatum.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/38633047675.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/38046643163.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/administracion_publica_federal_unam.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/noloxudutisefen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005720.bin
dbde68a6bd1e2fc4f92f8a2f4d022e16adc55a6405ce19dd60939ec476c1a9f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5720 5452 bytes
font_01_sfnt_off0000697d.bin
8c40ad0dc1f24ebed83eb98793ee2efbaed6970255311cc2f3158e8e2fe211de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697D 15788 bytes

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