Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a5a293b61f7b80…

MALICIOUS

PDF

44.6 KB Created: 2020-11-02 23:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 06c933db27d98f6538ee749bb67684d4 SHA-1: f938e56b9839025ec890028d41bcf20a540d8c3b SHA-256: b2a5a293b61f7b803776db6f9a6e3089eaa810b223f385677035b1518df3d57a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised within content related to 'hair color for older women with thin hair'. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly indicate malicious intent, likely to lead the user to further malicious sites or downloads.

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://ttraff.com/123?keyword=hair+color+for+older+women+with+thin+hair In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5f8c29683caf1.pdfIn PDF document text
    • https://zipexozinapewew.weebly.com/uploads/1/3/4/3/134339437/2606894.pdfIn PDF document text
    • https://gomamatugapisum.weebly.com/uploads/1/3/4/3/134392688/rojewejapamoname.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5f9de802c8769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f922e7043de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_5f9331f5371b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f9416d299d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_5f98784715e86.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/1/0507/6896/9899/files/a_civil_action_jonathan_harr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7257/8220/files/2020_samsung_qled_65_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8306/3986/files/67661994869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5410/3203/files/boragojedatixuzom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/old_ship_of_zion_pilgrim_jubilees.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0969/3636/files/intro_to_numerical_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7554/9333/files/solla_sollew_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5953/0906/files/boko_haram_in_cameroon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7612/7394/files/garojigotarikojasixe.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_off00006fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC1 5136 bytes
SHA-256: 5f3537f28cc55bdb0a4ea29f2a5764f46e76f5d84d17ce88e7c7ac1da33299cc
font_01_sfnt_off00008121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8121 10408 bytes
SHA-256: e46f1ce06a910d25f0a997b71ffb16880ce93832f523bb1e66a0089f888b1174

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