Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b879d8ae70c1ab6…

MALICIOUS

PDF

41.9 KB Created: 2020-09-23 00:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0115cae4998fd112a1cc9ff452e0da56 SHA-1: cfca36a167066d445087ca3c397d81988a433b6d SHA-256: 1b879d8ae70c1ab670645b1736b562daedc5f4c6c9461623dcd8e525a1599cf2
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Super Mario Bros.' and the malicious URL. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning. No scripts were extracted from this sample.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=super+flash+mario+bros.+action In PDF document text
    • http://ridajo.otterbourneparishcouncil.org/uploads/1/3/1/8/131856590/7058241.pdfIn PDF document text
    • http://files.bluestone406.net/uploads/1/3/0/8/130814397/raridina_vidigurum_nawoxur_roteruxosalega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6d6e2a8-d382-4782-80d2-5fac6f8d9af0.filesusr.com/ugd/8acad3_69e22543770440c4b8115841ad330b03.pdf?index=trueIn PDF document text
    • https://86d1bf27-e9fc-4f6e-af66-c9f15f67a591.filesusr.com/ugd/460efe_d3b760bb66bd44d7a72c156e1b551c8c.pdf?index=trueIn PDF document text
    • https://8b49de70-13cc-441d-ad6a-d8197dca1703.filesusr.com/ugd/7dd30d_2f148755076a4314828aa09062e47676.pdf?index=trueIn PDF document text
    • https://16812362-1d96-4e1f-bcd4-97659c76cebe.filesusr.com/ugd/f99735_e362cc2275774830b7bd9bb8a2d6e6f1.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1885/2264/files/seluwiwimute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/zosaxebazot.pdfIn PDF document text
    • https://b5ef0745-38fa-4457-8ca0-4bf20bc64d46.filesusr.com/ugd/f1780b_a14b390182414794864ca9671e0b44c6.pdf?index=trueIn PDF document text
    • https://23c6e5a5-d0da-4185-b800-a59825db5807.filesusr.com/ugd/565485_2daa4fe856104bf0b50fad835ebfcf5c.pdf?index=trueIn PDF document text
    • https://5606ee79-221a-412b-a8b0-8ad153bacc0f.filesusr.com/ugd/9ea9b6_5f6d5b83e3ed4f3aafa430e1b2745ee5.pdf?index=trueIn PDF document text
    • https://439b7e0c-4a0c-4a6b-9a90-bb14718fec15.filesusr.com/ugd/7603ae_7968e256c2ba40eab2bcef4a631857d2.pdf?index=trueIn PDF document text
    • https://40506327-5c04-473b-837d-7847d07e02ab.filesusr.com/ugd/1b6cec_b37aa81016a249ef9c1bcc87ae2eb8a6.pdf?index=trueIn 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 2

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_off0000653a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653A 5528 bytes
SHA-256: d2b7863972165db13ec8354c3c0dd6f27af34ca351b2af14e38c4fa1e02d777d
font_01_sfnt_off000077db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 10348 bytes
SHA-256: c195e30a329867108511e98bd58030457393bded779fd039ff2b1301bf0186df

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