Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf423de1db206d8…

MALICIOUS

PDF

43.1 KB Created: 2020-10-28 17:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 6ebf6ffc0275b499615ab141b8cb836d SHA-1: a08c5889feb66920bef200a9fd2d26dcb558d212 SHA-256: ccf423de1db206d8f548a923f33146c32f0da3112bab40faa5d2561a36c8de8c
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://ggtraff.ru/aws?keyword=italian+consulate+houston In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f98e18bb32ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f89ba31dd09a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f8b29c6def02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5f8a4d8d94aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f93c9fd274df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0707ea3-2d0e-4925-a8e7-ffcf7eacad97/85073301485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/wivodavidipitituxawutaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0744/6687/files/apeman_dash_cam_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7607/4654/files/cpt_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229e7f0c-331a-4c4e-81c7-603671df0e47/xawotumixaresujozad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c33ffc8-f0b1-45a7-b082-1a69d8d6b755/6559974559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/402c52ed-020f-45c3-a504-95e209698d24/62569993585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fe0cdc-1259-4af1-8c1d-446dc6cb9355/xamupunupuradakebonomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a940385b-26fb-4c7e-83b2-b98b1676d02e/30441500131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d80b89-f38e-4cc5-b4d7-30b49b615087/igo8_harita_indir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8106/7421/files/kanazaxinonopuzujafesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080b6a86-df0e-4723-b583-29599ae82103/bekeresobutesugasoxin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0ad9d9-f60a-434a-993e-c2cb5ee67168/26808429927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6801/3723/files/fuxaruluju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8844/4068/files/capital_markets_authority_act_kenya.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_off00006998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6998 4728 bytes
SHA-256: c9566257b9a780d8039e97c1a85c1bca8950be3ea0129c3e6a8ab27274fdf245
font_01_sfnt_off000079a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A5 11028 bytes
SHA-256: c8c185cf25a1f6a04cc922fff2d3438fef0b4352fd3edef9c488609f11ca8a54

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