Malicious PDF — malware analysis report

Static analysis result for SHA-256 612663f5f0476976…

MALICIOUS

PDF

44.3 KB Created: 2020-08-23 09:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 220261e6a02960ff73e951a205347ef5 SHA-1: f240b2dd171e4cd6c81366645ca39c8024dcccf5 SHA-256: 612663f5f04769767ae2345704c02d03ff4dbe179ccb28006b9b99fe98f046fd
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 that is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting it is an 'answer key' and includes the malicious redirector URL. This indicates a phishing or scam attempt to redirect users to potentially harmful content.

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=answer+key+for+10+maths+2019 In PDF document text
    • http://files.healthypathinc.com/uploads/1/3/0/7/130776366/7892926.pdfIn PDF document text
    • http://zudul.alyssarcieri.com/uploads/1/3/0/7/130738902/30bbb3.pdfIn PDF document text
    • http://files.sonomacountycagers.com/uploads/1/3/1/4/131453735/8295339.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/1/0434/3011/7526/files/6730934030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/libro_el_aprendiz_de_brujo_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/77958311421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/busas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/9608/9252/files/misemepazowitaloweruw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2737/3990/files/halloween_math_worksheets_for_preschoolers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/antenatal_screening_guidelines_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/84525154986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/airtel_voice_call_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1094/0328/files/acing_the_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/legendary_game_of_heroes_f2p_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/upkar_publication_book_download.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 2

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_off00006cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD5 5704 bytes
SHA-256: fb3ee3e6bac8693a92cac844e30342909c0b280720a32f1b95b3d081984942a4
font_01_sfnt_off0000802b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802B 10736 bytes
SHA-256: 83ede15cd597707dd452de69badc6b4e984b1e0f9838e5cfb7cace7a195ee376

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