Malicious PDF — malware analysis report

Static analysis result for SHA-256 1583d9619304bd95…

MALICIOUS

PDF

36.3 KB Created: 2020-08-14 21:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05e2ac5573a98e921e5c4bf0cbfc4127 SHA-1: da20dbd095b9fddd99a98c1698d7fa949a182e66 SHA-256: 1583d9619304bd95fd5c71167e76f863874cacb349f772a73b682f02540324ed
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though obfuscated, contains text related to an 'Ofsted report' and a malicious URL, suggesting a phishing or malware distribution lure. The ML classifier strongly supports the malicious verdict.

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=sfx+school+liverpool+ofsted+report In PDF document text
    • http://files.winslowschoolofmusic.com/uploads/1/3/1/3/131379296/xawolopaxulunutok.pdfIn PDF document text
    • http://files.oldjohnsrugbyclub.com/uploads/1/3/0/8/130873944/vefixatigutabuwomemu.pdfIn PDF document text
    • http://files.bvmusicboosters.org/uploads/1/3/1/4/131483445/sumogor.pdfIn PDF document text
    • http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.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/1/0435/2521/0263/files/biblia_el_nuevo_testamento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/krugman_and_wells_microeconomics_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/74471908284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/49050466130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/88500534112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/ccna_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/63447226154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/tenolovekibapefiduxedagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/89380694462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/gijugujasafonajifikul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/zifapel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/lexical_semantics_by_alan_cruse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/lokojejetomemitoferowune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/relemutegobapa.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_off00004fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAE 5264 bytes
SHA-256: 722e7d4197d565f007152bfa7bf0fbf5178aca44d35d2be5c8b4fe9633267a66
font_01_sfnt_off0000619b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 10264 bytes
SHA-256: 7c80e2e4cc93a29cd21089ae2ec68356d04079bfd2208cb82447487b943ddd84

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