Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47761b9c85e1000…

MALICIOUS

PDF

31.3 KB Created: 2020-10-30 12:35:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5955ebf3261992833c42263db85e6032 SHA-1: edd1804e1004e9f10acd9c6fe23b0e9d44859c4d SHA-256: b47761b9c85e10008182282a2844aed5c59aae74b54e831d1fb32a3b467e2e9e
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF is an image-only document designed as a lure, containing a clickable link that redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL is part of a known malicious redirector chain. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger network of linked PDFs, likely for SEO poisoning or distributing malware.

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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 31 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/123?keyword=arendt+truth+and+politics In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f8bad7e449f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5f991dfeef95b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f9044c45c99a.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/tosuket.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f8bbfc0e3a36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8728cc2bb20.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/1/0434/7500/9698/files/free_preposition_worksheets_for_1st_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8943/6068/files/green_canyon_high_school_athletics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9851/6893/files/picsay_pro_mod_apk_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7551/0694/files/92423696571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6223/7621/files/definition_of_the_word_manual_labor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9416/6683/files/37947605506.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/lepekekemawexorikaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0853/9299/files/portable_charger_walmart.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_off00004407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4407 5152 bytes
SHA-256: 405050c4a4e6f137357ee4206bf2c6bc27f2386ab3ef79fc8b926ee27a3a2aeb
font_01_sfnt_off00005584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5584 7996 bytes
SHA-256: a583e0b0301f3c522d629443a84f61e8a45ee4266fa7eeed30487511fff442ea

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