Malicious PDF — malware analysis report

Static analysis result for SHA-256 f589c41adb6d697e…

MALICIOUS

PDF

54.8 KB Created: 2020-08-20 11:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 34c160d8674edbc63b3e7c4b49212613 SHA-1: 38e1fa37577eae2940dc074b73de3488a73630f0 SHA-256: f589c41adb6d697e121a724b16b3ff0f4cfb0a3d34fb34b4a60ba357d0973165
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically targeting searches for 'musescore flute sheet music'. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link-based redirection attack. The embedded URLs are part of a link farm, with one URL pointing to a known malicious redirector.

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=musescore+flute+sheet+music In PDF document text
    • http://files.skinlosophy.shop/uploads/1/3/1/0/131070849/25cad8cfc.pdfIn PDF document text
    • http://sibip.spoontogether.com/uploads/1/3/1/8/131856772/3910992.pdfIn PDF document text
    • http://files.tranceformerstraining.co.uk/uploads/1/3/1/3/131379828/e2b187ac89.pdfIn PDF document text
    • http://xututokof.theguppygulch.com/uploads/1/3/2/7/132740978/pugejizosovewibolo.pdfIn PDF document text
    • http://files.yashbangera.com/uploads/1/3/0/7/130738625/83486b04a35.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/1/0440/0313/1542/files/modular_belt_conveyor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/carmina_burana_percussion_score.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/68778754303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0722/7542/files/70999825950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3507/3440/files/wurofux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0894/9409/files/exercicios_botanica_projeto_medicina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/82723381249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/96129988327.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55EC 11824 bytes
SHA-256: 1d39baf6ad0994b4e6b3c4468f5514e14a3003216bebd177265e3afd79907467
font_01_sfnt_off00007c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 4692 bytes
SHA-256: b66effb6a4c04eb2eaa7a1fdc006464e98e674c995b81b24e90a58b179faafc6
font_02_sfnt_off00008c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C54 16036 bytes
SHA-256: 9787990fb163dc2dfba3c999fdfacc72052796a09e5f0d4841d379b2f8ced6f8
font_03_sfnt_off0000be36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE36 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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