Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a75c014ee938fa…

MALICIOUS

PDF

39.1 KB Created: 2020-11-05 07:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 222079b4f2547afe60a7b56a7f393674 SHA-1: 16a9d383bd7b0cb12bb3394ded801889cc1c6daf SHA-256: 57a75c014ee938fa36c850f1586aa66c4bcc4e81284414a7e2512ac479bf0407
94 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ggtraff.ru, which is associated with distributing malware. The document body also contains the same URL, suggesting it's the primary lure. The ML classifier strongly flagged this PDF as malicious, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of malicious infrastructure. No scripts were extracted, but the embedded URL is the main indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/strik?keyword=dead+trigger+2+apk+mod+unlimited In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_5f9d2efe0fc8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f8f596ed26b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5f92034f97d6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f87017f409a1.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/8e8dc0fb-9eb4-495b-be18-c344f73f8459/dozoxovixuripukajonixaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec13ee49-553a-4a72-8651-93e2b84ab0cf/befirugoviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71711771-7fd2-476a-9231-964a7bc2262b/77869349755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ff06e6-8ebb-48f4-9499-e52b113c70bc/2970563192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9025b8a-8acd-45a1-9397-66e5191705cb/54875922472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ed943f-0df9-453a-8a1d-507c28de5ec7/essentials_of_statistics_6th_edition.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_off0000593f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593F 5296 bytes
SHA-256: 1d2869d14c9f82b3813912dc1b8b5001a87dc4aa19db818b77d9dc527f0c5d30
font_01_sfnt_off00006b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 11280 bytes
SHA-256: 8b382fa789896655519bca6f6f419f997243ddf2ee544a6141c64a9b2e620493