Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cb256fb4ad9714…

MALICIOUS

PDF

46.4 KB Created: 2020-08-06 12:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f34ad62d2a4ecb55f0a2773c17509c82 SHA-1: df6c1d003fdf7812962315fc7f194ba5c409c58b SHA-256: 24cb256fb4ad9714cd1e4e490c0574d4a568435980c6d1611c9fc45e865d9d4d
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.ru, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains the same redirector URL and references a PDF related to colon cancer, indicating a deceptive lure. The ML classifier strongly supports the malicious verdict.

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=cancer+de+colon+hereditario+pdf In PDF document text
    • http://files.kairakunda.com/uploads/1/3/0/7/130739542/vixunu.pdfIn PDF document text
    • http://files.teadrunktailor.com/uploads/1/3/1/4/131453206/sakolerojoxuj.pdfIn PDF document text
    • http://files.missmackeysclassroom.com/uploads/1/3/1/3/131383514/89584d09f2a2c37.pdfIn PDF document text
    • http://files.spacesmonterey.com/uploads/1/3/1/4/131454808/64dd10.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/1/0432/8285/8144/files/98573111226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/doxewojurupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/75707932129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/fipusezobaborovadekotude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/tipixurotozebofugetaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/28873209661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/87604233389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/tugabikovuvade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/13th_skull_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/80479156853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/warframe_tear_azurite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/fidaguxor.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 7

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_off00007974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7974 4968 bytes
SHA-256: 9b54897d891755b08313031aa89680da37f855c04ce09245042458a39ac4648d
font_01_sfnt_off00008a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A51 10112 bytes
SHA-256: 96a7decf9d0aae7e8f3d2d22de3fc663b324032506b70af68aeed9feb50dde97

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