Malicious PDF — malware analysis report

Static analysis result for SHA-256 3374ea6f3075e173…

MALICIOUS

PDF

37.0 KB Created: 2020-08-07 07:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ffa7a62d4987f155dd0b4e073a7415c SHA-1: 4393d5902889c278ebab34088b17a2b74e2686c2 SHA-256: 3374ea6f3075e173770b18ab3db7d038af92cdb8e3978f89ca3f825c9cac0713
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to `https://ttraff.cc/pify?keyword=siyavula+maths+textbook+grade+12+pdf`. This redirector is known to lead to malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body text, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a social engineering attempt to trick users into downloading malicious content.

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=siyavula+maths+textbook+grade+12+pdf In PDF document text
    • http://files.ausginday.com/uploads/1/3/0/9/130969056/d57919e8bc.pdfIn PDF document text
    • http://files.almeria-estates-and-realty.com/uploads/1/3/1/4/131437351/fefozo.pdfIn PDF document text
    • http://files.pro-formancecomputers.com/uploads/1/3/1/4/131452944/ca846f7aa.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/1/0430/1609/3849/files/surodezanag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/dusofolorejobumamunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0714/7162/files/take_out_the_gunman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/living_religions_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/cell_biology_by_gerald_karp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/17530228454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/topatugaxulonoruludosopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/army_class_b_uniform_setup_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/92621133650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1600/9374/files/lobiloj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/xaraxedoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/3297778905.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 8

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_off00005147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5147 6176 bytes
SHA-256: 8bb7b03f4f6c677c88233f4a7b690f52309d99c95e1d240e9861399c9ffa4197
font_01_sfnt_off00006631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 9700 bytes
SHA-256: fccd09d4101bd5563223782bb42a410022b815994c918b00d43221ce14408890

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