Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfc2cf5dca59d88…

MALICIOUS

PDF

41.9 KB Created: 2020-10-16 16:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a411c0a968eb32338feafae0ec73ac96 SHA-1: f03e6bdc821001b6319742a7fc02fe0983831096 SHA-256: 9dfc2cf5dca59d8863492b3d3e2a5c9e021894ae3a011a9610c90bdbc93803b6
154 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body contains numerous embedded URLs, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to external sites via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/wb?keyword=desde%20que%20te%20fuiste%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f896f4ad89f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f886043123c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f88c0b76cc76.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/naretizikoti.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/c25ed073a.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/440e9b52fb1.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/gegibonupava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f889bbc8b62c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5f88a6fe67a4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f890bdf13d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8717bc5aa04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f894b0c13f09.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/1/0432/2007/4663/files/91665728572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/48875864441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/wifunigum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8393/8457/files/what_is_mouse_acceleration_in_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2876/files/directions_to_bwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7308/0996/files/how_many_ounces_in_one_shot_of_alcohol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/filitizale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/for_the_function_h_whose_graph_is_given.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/letter_to_santa_template_black_and_white.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_off000063d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D2 4820 bytes
SHA-256: b2a59179daa84b800d30a8dcbc0e2a4b91a46e05dec516696391a5e7ef62b0ed
font_01_sfnt_off0000744f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744F 11220 bytes
SHA-256: 682222a4742eb18dabe8bdeee535c02f9c38cb9ee96b63ab9efbfe4b9021eb57

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