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)
MD5: 05e2ac5573a98e921e5c4bf0cbfc4127 SHA-1: da20dbd095b9fddd99a98c1698d7fa949a182e66 SHA-256: 1583d9619304bd95fd5c71167e76f863874cacb349f772a73b682f02540324ed
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that are identified as malicious redirectors, specifically pointing to 'ttraff.com'. The document body, though partially corrupted, mentions 'Sfx school liverpool ofsted report', suggesting a lure to trick users into clicking the malicious links. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://files.winslowschoolofmusic.com/uploads/1/3/1/3/131379296/xawolopaxulunutok.pdf
    • http://files.oldjohnsrugbyclub.com/uploads/1/3/0/8/130873944/vefixatigutabuwomemu.pdf
    • http://files.bvmusicboosters.org/uploads/1/3/1/4/131483445/sumogor.pdf
    • http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/biblia_el_nuevo_testamento.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/krugman_and_wells_microeconomics_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/74471908284.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/49050466130.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/88500534112.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/ccna_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/63447226154.pdf
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/tenolovekibapefiduxedagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/89380694462.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/gijugujasafonajifikul.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/zifapel.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/lexical_semantics_by_alan_cruse.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/lokojejetomemitoferowune.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/relemutegobapa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fae.bin
722e7d4197d565f007152bfa7bf0fbf5178aca44d35d2be5c8b4fe9633267a66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAE 5264 bytes
font_01_sfnt_off0000619b.bin
7c80e2e4cc93a29cd21089ae2ec68356d04079bfd2208cb82447487b943ddd84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 10264 bytes

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