Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe93c906f7a02e2…

MALICIOUS

PDF

46.2 KB Created: 2020-11-02 14:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1a76ddd1efa6d7ba6e1f9b99b9e86d96 SHA-1: bd597b9a684fa3f1a3a297428d8fa2ccd8bef4f1 SHA-256: dbe93c906f7a02e2ea2b03ea24b2930a5e8120b81d53c7642df8440c4c16afc6
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?keyword=clicker+heroes+save+game'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/strik?keyword=clicker+heroes+save+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f94ead51cf9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f9e38998b830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5f9de7b3ce6ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f9b57be66cab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f8f70209144a.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/e16f203c-c23d-4c88-a095-1286d0fbe0bd/93929275470.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/option_strategy_hedging_risk_management.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/bedowezu.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/the_weight_of_glory.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/manuresemojuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460e487f-8f9e-493f-ae73-c02974fdd4a5/81149510825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3109e6a-bb24-4989-95f6-e2afa42ae14f/pofilem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0509/3874/0923/files/super_lotto_plus_winning_numbers_november_23.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_off000077c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C2 5240 bytes
SHA-256: cbb430089328083c0be0781ab19bb9b6565aa0df01b20911bc9b8148cc37f879
font_01_sfnt_off00008976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8976 10264 bytes
SHA-256: 6e9b011adac8b2c94672813ca77a2637676defe3054aa3d0b11de0b8ce53680d