Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca123f8c3d1a0d7…

MALICIOUS

PDF

45.9 KB Created: 2020-08-16 18:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1266a742f282fcac6f04bfe71dda9c81 SHA-1: e1372c679cc7992405b4f1727b2942f40f555828 SHA-256: eca123f8c3d1a0d73de11334937e9f493cce2e5f4a54ce9373377c2e2190db7d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of external links and the presence of a malicious redirector are strong indicators of a malicious document.

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=pyriform+sinus+anatomy+and+physiology In PDF document text
    • http://feken.dsorderless.com/uploads/1/3/1/3/131384611/borixebuforuta.pdfIn PDF document text
    • http://files.jindabyneyabbies.com.au/uploads/1/3/1/4/131409098/34a647e31.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/1/0428/9154/2681/files/pinexaderebatolegife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/hayward_sand_filters_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/guretaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/27700461094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/476630084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/54218892936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/ranutavapikazujafogumafed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/15240847232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4400/8099/files/18829325498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/44789816040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/25322125946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/kabowakiro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A87 5556 bytes
SHA-256: 0cfdbef0a08ce89453c7479c7ffc3c9e5e95007169782936a69d974ff992957d
font_01_sfnt_off00007d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3D 1712 bytes
SHA-256: 21e08c9e098e8ef01b329287e9efef18d21ee9a274f8fe04589064eb316b9f9a
font_02_sfnt_off000085c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C2 10840 bytes
SHA-256: c9f3a6d768a9bc5c2fbf5903790611e3d89c115b4347e0d4cee6679b7030ab66

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