Malicious PDF — malware analysis report

Static analysis result for SHA-256 941f88ee99a79b80…

MALICIOUS

PDF

44.1 KB Created: 2020-08-19 06:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 62acf9f1a45436a4c449d736d71716dd SHA-1: 6f1506c39dbe4480a8cb600b4b41348899101674 SHA-256: 941f88ee99a79b80d1c4acc003b0808400217927ef59cf2c2ef3c94be166fe0e
194 Risk Score

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=performance+review+comments+communication+skills In PDF document text
    • http://luputod.riverstonegallery.net/uploads/1/3/2/3/132302870/xopaviwuje.pdfIn PDF document text
    • http://radesomu.townofdresden.com/uploads/1/3/1/1/131163729/puxiwakujuzetikij.pdfIn PDF document text
    • http://files.serendipitygarden.ca/uploads/1/3/1/8/131856987/nunajitutise_zezen_sonokezer.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/1/0437/5724/0478/files/39384658765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/jobepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/contract_sample_between_two_parties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/sogute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/yarra_valley_water_water_quality_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/93767692351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/60186463162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9473/6037/files/7_little_words_puzzle_50_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/tratados_comerciales_de_mexico_con_el_resto_del_mundo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/posujipupisolawujitoli.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_off00006f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F80 5244 bytes
SHA-256: eab13ecdb5ddddd4748088e9b5c46edf23dce7c2175ea0380f39b1126f8e135b
font_01_sfnt_off00008155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8155 10052 bytes
SHA-256: 76ed54fbba66196874ba3be2a811fa0bf725736dff8287e7b6b108548074a909

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