Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c40b930827f804…

MALICIOUS

PDF

33.4 KB Created: 2020-08-17 15:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81d57481967a4f2cee57bfd976fa2b25 SHA-1: d955c34b3d619c3ddb42799dc087a9053e5c33f4 SHA-256: 92c40b930827f8044f3989f3ec7364be78c876678c97bbeadac3f28ccb3e8e9a
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though partially obfuscated, suggests a lure related to an 'answer sheet' for 'DNA, RNA, and snorks'. The primary malicious URL identified is https://ttraff.ru/pify?keyword=dna+rna+and+snorks+answer+sheet, which is likely used to redirect the user to a further malicious destination. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=dna+rna+and+snorks+answer+sheet In PDF document text
    • http://fomamez.rickbirley.com/uploads/1/3/1/6/131636612/924776.pdfIn PDF document text
    • http://files.crescentmortgagecompany.com/uploads/1/3/0/7/130739204/sesafutajajalivewok.pdfIn PDF document text
    • http://todolido.candacegayle.com/uploads/1/3/1/6/131606552/kurizufovimotajum.pdfIn PDF document text
    • http://files.johndileonardo.ca/uploads/1/3/0/7/130775144/1a6ff18b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/segundo_arco_branquial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/73060005562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/skf_double_row_taper_roller_bearing_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/69038424817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/21321991699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/tudamotunujikemuvixare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/baguxiwolagoribonap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/asperger_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/shaft_boring_machine.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46DF 5036 bytes
SHA-256: 1ef2a46c8895ad413065462360cb5ec0c3ff283a4651994dd1de5d2d25057a4c
font_01_sfnt_off00005811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5811 9660 bytes
SHA-256: c1749197a24ff73333f884aff6e476885e3650fc97b432427f4ae7583016ab44

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