Malicious PDF — malware analysis report

Static analysis result for SHA-256 406831ff0062bf2e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 18:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0127ad9af7a896c31efadb407459833 SHA-1: 2ceb8802f6d8caca21c25d7c3285cec44f996c39 SHA-256: 406831ff0062bf2e944ade76ffb1d2151d3648e4220e0f1c97d432aeeec1f8d0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to domains associated with link farms and redirectors, including the critical finding of a malicious redirector link to ttraff.ru. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=dinosaur+coloring+sheets+printable', suggesting a lure to disguise malicious activity as a search result for coloring pages. The ML classifier strongly supports the malicious nature of this PDF.

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=dinosaur+coloring+sheets+printable In PDF document text
    • http://files.theamenfgfi.com/uploads/1/3/1/4/131437941/7959214.pdfIn PDF document text
    • http://files.keepanopenmind.net/uploads/1/3/0/8/130814642/354913.pdfIn PDF document text
    • http://files.frenchinosathome.com/uploads/1/3/1/4/131437172/neviloboz.pdfIn PDF document text
    • http://voforen.tickettoridegreatloop.com/uploads/1/3/2/7/132741555/1383544.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/1/0429/2804/6233/files/25434585557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/africa_toto_choir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9081/0782/files/momejupadedate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0630/files/65976253956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1609/2828/files/98363171517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/jafuxutimimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/cetoacidosis_diabetica_tratamiento_nutricional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitomomuwarusubewikujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/20055227170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/blender_cycles_material_nodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/usabo_past_exams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/bridge_to_terabithia_activities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2400/6823/files/wowatesisik.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_off000063c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 5332 bytes
SHA-256: b8d94f0805734393922fc7761cabb2f8452b77d57085cb33ad090ec69ddba53d
font_01_sfnt_off000075d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D5 10060 bytes
SHA-256: 6cd598302c0d222f3291ea2ed4e2dababe58e2f0d9797bd6f4b5581df07dea67

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