Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa146623372ce74b…

MALICIOUS

PDF

36.1 KB Created: 2020-11-06 16:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 16e4d0acec022b43e2f91f8bd837f0e3 SHA-1: b5fb3fa1a58efd4f4c41e84665acdd5f21626a9b SHA-256: fa146623372ce74b61b95f41b4c17c11b87e6be4d9e973ec6cc62e260a555ebb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and contains a link to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/123?keyword=bleach+subnautica+below+zero, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was heavily obfuscated.

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://gettraff.ru/123?keyword=bleach+subnautica+below+zero In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_5fa16b8c137f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5fa4653e26586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f90452bd7e9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5f8f71dfbaa68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413361/normal_5f9585429730f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427544/normal_5f9dae3cb1ca8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/damevusom/instant_pot_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/luxesimisefuledisereb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eea21eb-42af-4779-a061-9851747aa185/rigobirogame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c711075c-4b0b-4706-87cb-45c02f461848/79575510565.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/antagonistas_de_vitamina_k.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/ramalingam_ram_ratnasabapathy_md.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_off00005037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5037 5216 bytes
SHA-256: 7b9e2962741b84e3c979fed91b72d361311ab6d3697fbd33eae9be161afce9e9
font_01_sfnt_off00006206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 9984 bytes
SHA-256: 97f080ed801056d310407e69edc681c2c25d4a897b15ca2342f0a95a4bf486bb