Malicious PDF — malware analysis report

Static analysis result for SHA-256 389f5a4669279119…

MALICIOUS

PDF

43.3 KB Created: 2020-10-25 10:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 391eed35f1a70845a08849fa456b630a SHA-1: 9ed6553b3838722948c5f130426003c2f610dada SHA-256: 389f5a46692791192bd3fe7c0d609f8143f1ccbfac68be98a4b5213e372d14a6
194 Risk Score

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.me/aws?keyword=evening+gown+pattern+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f93f8aac6b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f8c708106136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_5f950e4181111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5f943f78b10a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f8dfb0bd1720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_5f926e5d4bc68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5f931b202e935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f8f303c9fc56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f90eefeb17c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f86fffbd83d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f8acf7277254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f8d5c3fc84f6.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/1/0488/1527/6197/files/jakafenatexusujel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/regulation_of_lipid_metabolism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/52061306320.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/jiverilabisorujikapedo.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/nurudetitawaxurelotifumon.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/maths_book_for_class_9_icse.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/neonatal_sepsis_guidelines_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/catalog_hafele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858bafea-b911-4850-b20b-7fbb80ffda33/tagufewumado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff0e911-0b22-4791-a35f-2cb7c132f233/guxuxawopawagesosibisuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff60d02b-76de-4624-bef8-d42f56b06989/50529273930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1106bd1-bc51-4628-87fb-23b49689ba53/poe_enlighten_support.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F2 5108 bytes
SHA-256: 2e60e154c03bf958959a507b051fbf47a994c2df77d6aa334d51616fb9840827
font_01_sfnt_off00007987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7987 11300 bytes
SHA-256: 2a801936714dd9d9cefd8e3a566f26e24136567568ea7bcc8bb621ce381d20f5

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