Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d82a6d85be5036…

MALICIOUS

PDF

44.3 KB Created: 2020-11-04 16:07:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3f73361b9c0b862921ce7f1d62597b6a SHA-1: 23d32b04caef27159491ca4dc96303bc20dbc333 SHA-256: 80d82a6d85be50362d9425bc45d16309c870044295fc8237c14d56aace3cc977
134 Risk Score

Malware Insights

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

The PDF document contains embedded links that point to known malicious redirector infrastructure, specifically `https://ggtraff.ru/123?keyword=briggs+and+stratton+service+manual+093302`. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to trick users into downloading potentially harmful content. The ML classifier also strongly indicated maliciousness.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://ggtraff.ru/123?keyword=briggs+and+stratton+service+manual+093302 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f8c66d6d6101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8818145eb41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f93e41669f48.pdfIn PDF document text
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/dekorugenidajejijaz.pdfIn PDF document text
    • https://lobevebuwavija.weebly.com/uploads/1/3/4/3/134394718/4039537.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/mimuwev.pdfIn PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/a963dcfe8e2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbbf32c-13be-4bd3-b715-16a923f5a405/nudos_mentales_bernardo_stamateas_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/18015059839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd6b082-d3a3-4c27-9737-5bb3e74549a3/ruvuxifuvirimezupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d3c272-f59f-4a0e-a2d3-1ae90d8e0033/ferojumemufukavi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000690a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690A 5960 bytes
SHA-256: 71400dca43e8ffd123db623c008bcd919838e2bc022b8f408ff2b3e906449d75
font_01_sfnt_off00007d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3E 11564 bytes
SHA-256: 6af1f88eae035d046a8a78b1b86286c0c52dde37bfae78c530c8e851c2395f8c