Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae363823fc1916b…

MALICIOUS

PDF

42.3 KB Created: 2020-10-14 21:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 567fe3f7ae264eabfdd323368c59615e SHA-1: e7fc2751b60d7d32b01cc6e9cc24d2dd6e40e70b SHA-256: aae363823fc1916bceffae2012009172e57dc73a5b3129e334d46fb9e21541a4
154 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://gettraff.ru/123?keyword=party+poker+app+android+download', is flagged as a malicious redirector, indicating an attempt to lead users to potentially harmful content or applications. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/123?keyword=party+poker+app+android+download In PDF document text
    • https://site-1044062.mozfiles.com/files/1044062/29111131302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f87046a25fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f8731cd7b41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f872600527a3.pdfIn PDF document text
    • https://site-1048166.mozfiles.com/files/1048166/putevoxu.pdfIn PDF document text
    • https://site-1043646.mozfiles.com/files/1043646/jaletonaxozude.pdfIn PDF document text
    • https://site-1038482.mozfiles.com/files/1038482/21119786021.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/1/0486/2430/4286/files/carrie_prom_scene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1370/7688/files/sofaxazupamojoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7568/5537/files/70155999819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6516/4454/files/minecraft_enchanted_golden_apple_seed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccf8ef6-f955-4b61-a92a-e48c5d7c2332/favekuxezidanif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3d9902-c56c-46bf-b9ef-e7cf3f11e367/sonekam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e3621b-a146-4196-a4ff-075d4a208a5b/jukedivifejanivokamekagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/kodubivujolefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4793/5896/files/wavovuwise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1241/3847/files/jonathan_burrows_choreographers_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4755/8563/files/wood_shop_safety_test.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_off000067cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CC 5036 bytes
SHA-256: 498ebaeff6e301bb47dc0b6be0712e3823c0ac0d4ea4328289a56cea5d6c93f0
font_01_sfnt_off00007912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7912 10300 bytes
SHA-256: 5876ef84f5290dd1c28ac927e27d064c94e5d115cd8c29e57cc942d3895f5c3b

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