Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f41be227cf83950…

MALICIOUS

PDF

39.7 KB Created: 2020-08-25 03:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d453ac2286ad12e15d3dc67bd791c34 SHA-1: e262d4257ab30c28b0529e5e16904283c85933ec SHA-256: 4f41be227cf83950c304100c1571438ad90223114942fdb3b8edec2a7a600da0
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector at `ttraff.cc`. The document body, though heavily obfuscated, contains the URL `https://ttraff.cc/pify?keyword=fax+face+sheet+pdf`, suggesting a lure to disguise malicious activity as a legitimate document. The presence of numerous other PDF links indicates a link farm strategy, likely to improve SEO for malicious content or to distribute the malicious links across multiple benign-looking documents.

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.cc/pify?keyword=fax+face+sheet+pdf In PDF document text
    • http://files.thedoosra.net/uploads/1/3/1/4/131452903/976208.pdfIn PDF document text
    • http://files.thewolfpackpodcast.com/uploads/1/3/0/7/130775102/e649d7.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/1/0435/1682/1672/files/strength_of_materials_important_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/gipix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6389/4173/files/musopoxebuwoxuzupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8190/7870/files/astm_a572_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/91114263691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3105/0905/files/github_create_new_repository.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/92901608083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8457/0012/files/bsf_application_form_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30551251375.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 1

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_off00005e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E66 5140 bytes
SHA-256: cf6a0bb2d33943b6f242869d8e7bc27ca9f9c92af0e5c15f966b6afc0866f44e
font_01_sfnt_off00006fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE9 10128 bytes
SHA-256: 7b48ded7f985ae1a830068ada0cb928110ca419014504ef75109e968e431ce0b

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