Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28dd55a908e99e9…

MALICIOUS

PDF

44.7 KB Created: 2020-08-05 05:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 756213473ab5d07da31d85f876b3181b SHA-1: 570e7215a3d61f853c8f3ba8a167b0d25fc4cd18 SHA-256: b28dd55a908e99e9ac891be479f85d0ff43573dd39e95e4528b00896693a460a
194 Risk Score

Malware Insights

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

The PDF document contains a lure promising a free coloring book, but embeds a link to a known malicious redirector. The redirector is configured with a keyword that suggests a search engine optimization (SEO) based lure, aiming to attract users searching for specific content. The document also contains a large number of links to external PDFs, many hosted on Shopify, which is characteristic of SEO link farms used to manipulate search engine rankings or distribute 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.com/pify?keyword=download+anatomy+coloring+book+pdf In PDF document text
    • http://files.aquacleanwi.com/uploads/1/3/2/3/132302944/162695.pdfIn PDF document text
    • http://files.evasound.co.uk/uploads/1/3/2/6/132695575/fubipixenumovenino.pdfIn PDF document text
    • http://files.royglobalized.net/uploads/1/3/0/8/130813095/ec1b16ee71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/89891260522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/hackerrank_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/vamuxis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/27619147665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9613/6097/files/voxitijiradefarufuwokefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/malisis_doors_1._7_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/toxumevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/5707705117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/zaputu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/13072826145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/61405519778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/91255547921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7332/2664/files/vabemesejul.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 4

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_off0000630e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 5364 bytes
SHA-256: 2fde5bfd5b9a9f17186facb34d56d41070294253d708ef3422df185a34a73e65
font_01_sfnt_off0000754c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 10104 bytes
SHA-256: 868e52c94e6d9dec0418b390d57705e6b5f18b90fc610a6efbd509afc2b3bea7
font_02_sfnt_off000097c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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