Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd9874cfe3349ab…

MALICIOUS

PDF

40.9 KB Created: 2020-09-17 12:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3bc28cb2c96d153ea0603eef841e8c5f SHA-1: edf36e684bf1d63ceeb6a01e383a486c4b7af461 SHA-256: bfd9874cfe3349abde9fa94003239f6fc0edcc68b1989cb03eb46715126fe9b4
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though heavily obfuscated, contains text related to 'custom ROMs' and includes the primary malicious URL. This suggests the document is designed to trick users into clicking the link, likely leading to malware download or phishing. 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.me/wix?keyword=how+to+make+custom+rom+for+mtk+devices In PDF document text
    • http://files.drcroes.com/uploads/1/3/0/7/130776641/zamudatadokij_koxox_pinogizufopu_sanuruxule.pdfIn PDF document text
    • http://balidi.windowsofhopeintl.org/uploads/1/3/2/7/132710712/ruginedolisuzeforu.pdfIn PDF document text
    • http://mevokaw.veganrepublicstore.org/uploads/1/3/1/3/131379121/5317659.pdfIn PDF document text
    • http://funet.amemr.com/uploads/1/3/1/3/131383651/27f5fe89333623.pdfIn PDF document text
    • http://repo.xposed.info/module/tk.wasIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bc941f51-994f-4e00-a081-3edf7ef728f4.filesusr.com/ugd/217d68_e703feadad6749f9b999ef73a98a3836.pdf?index=trueIn PDF document text
    • https://6305100e-e0a9-4c61-8b9f-a7940ee28b0d.filesusr.com/ugd/162fe6_3496aa506d504ce1b3a2900d31c87b95.pdf?index=trueIn PDF document text
    • https://8067a556-4d0e-49a5-b878-a5e23278c449.filesusr.com/ugd/9ef0c3_c95e88e5e65c42f4ae48e4db09bf57b4.pdf?index=trueIn PDF document text
    • https://819086d6-e7d2-448b-9b89-aebbf5e7eb45.filesusr.com/ugd/a4c1fa_d8a2478229dc4ecfb0a47ee263b97710.pdf?index=trueIn PDF document text
    • https://8f86e8ce-ffe8-4fe9-a03f-68bdc88f3698.filesusr.com/ugd/9c8fb9_40cf55ccfec8462e85607893d4d37817.pdf?index=trueIn PDF document text
    • https://bcd4758f-2094-4778-a4ee-b2ba9a3d2a10.filesusr.com/ugd/0ad6c7_a210322d06c94ad8a097e6cbf7d5eb68.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/russianhits_64_radio_logo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/espectroscopia_absorcion_atomica.pdfIn PDF document text
    • https://play.google.com/store/apps/deIn 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 3

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_off00005441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5441 5312 bytes
SHA-256: 70a9b8f109d93ed21f14418a11bb8c0a226cc04be2ec86a9dab42e6aa0ed3c21
font_01_sfnt_off00006648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6648 4456 bytes
SHA-256: e375f569c8c9a8635ce4695db5bd392672166b0fa54883d5f28b1a6e5cfc97dc
font_02_sfnt_off00007241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7241 10632 bytes
SHA-256: 4c96680a63083f1a08475c2b1ab319dfe547abe30f4c9d88effa9a0df4121f10

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