Malicious PDF — malware analysis report

Static analysis result for SHA-256 878ace0ce48bc564…

MALICIOUS

PDF

39.7 KB Created: 2020-11-05 03:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e9d04928bd757d55423f9ee36a22cbf0 SHA-1: a2d05dc07fa2d94f04ead6fe36d3557712d8ce41 SHA-256: 878ace0ce48bc5642ef673ed97f3e98a3c24a1810854955d3f8eec80b3b62519
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a redirector link to a known malicious domain. The embedded URL, https://ggtraff.ru/strik?keyword=hatchet+chapter+16+questions+and+answers, is likely used to lure victims into downloading further malware or phishing for credentials. Although no scripts were extracted, the PDF structure and the presence of malicious links strongly suggest a phishing or malware distribution attempt.

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=hatchet+chapter+16+questions+and+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392867/normal_5f8ec512bd1ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5f980a2cdbb7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5f9926686d18a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f9e103d082f0.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/cb134be8-3d3e-4735-a13b-6bc9da6b0f31/nuwiwepunetuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a4a037-254e-4e3e-9aff-7814691ffcc4/xojewixijinusevop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d5736f-d2fe-4962-8e2d-cac186b1042d/gizmo_can_opener_battery_fix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6055b1a9-d4b5-4f7c-8f1f-383f9f9f3fe6/engel_rs4800s_mini_firmware_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8a8845-64b8-42e8-8864-daccfca0cd6c/1913683572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081447e4-8135-4d7f-86d2-f4628bbdeef6/intex_saltwater_system_troubleshooting_code_92.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b1fdf4-52fe-4cf8-9530-a218f909cafb/divabamexenifelati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d298ae-bf2e-4b4e-b4db-81a333c535f3/library_genesis_website.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_off00005d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D17 5512 bytes
SHA-256: 0debd588a9cbe5f5fa7847850249b4b0ccd34eb2329eed0f5a8150445afb8e60
font_01_sfnt_off00006fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 10476 bytes
SHA-256: 8d5713bff490e68567ae53bd212531ce990cd03b4350c728d69967409a6e8a2a

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