Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3b54ce256d15ed…

MALICIOUS

PDF

40.2 KB Created: 2020-08-24 09:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 929d96e2dfce81915bad8f35876c9c17 SHA-1: 8aeab8c578184aecdf4c37a93f955701f82fb46b SHA-256: 5f3b54ce256d15edcf50171165033f269ec126725db0b8c9f40567f5c5093ed3
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body and heuristics indicate a lure for free sheet music, likely a phishing or malware distribution attempt. The presence of multiple external PDF links suggests a link farm used to obscure the ultimate destination.

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.cc/pify?keyword=freely+freely+piano+sheet+music In PDF document text
    • http://files.thecinnamonowl.com/uploads/1/3/2/7/132740498/bobaso-bidet-jemilot-valulusufeto.pdfIn PDF document text
    • http://files.centrocha.org/uploads/1/3/0/8/130873870/7918256.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/1/0429/6228/8793/files/sheet_metal_folding_machines_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/hexadecimal_to_decimal_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/best_reader_for_windows_10_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/fivop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8276/6743/files/paxowupazeviwona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/problem_statement_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7039/8362/files/mirud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6689/files/ssc_marksheet_2019_dhaka_board.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/pabusabipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5102/3510/files/55945390198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5679/8613/files/harley_evo_engine.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000451d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x451D 5192 bytes
SHA-256: 4f70115c40780d0777354998859d1086e9be90a323c4c458a3a0662a10a0e004
font_01_sfnt_off0000569f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x569F 14364 bytes
SHA-256: 7a5683fbb199e8fec35ec4cfea84f22c81ee97867f74261ad795968172bd7a26
font_02_sfnt_off000083f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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