Malicious PDF — malware analysis report

Static analysis result for SHA-256 92164e77004171f4…

MALICIOUS

PDF

62.6 KB Created: 2020-11-03 02:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f3f1b9aa48bc99a4a0008d30eb352f9a SHA-1: dffef3df012d2b6f2f1add3d5032697e2c481f7f SHA-256: 92164e77004171f4ec505a5db172b46f4bf4ed1b5829191fb76df7f5ffede93e
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/aws?keyword=dill+mill+gayye+cast In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8bd0a27ce2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f89f908d171f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424682/normal_5f9a0f3c30954.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/90b04b7e-dc54-41f4-b9e0-a22d166d0370/69504156127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7367/0820/files/ac_current_fundamentals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1172/1381/files/romozupotituruxabitona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/jevewewogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1889/7573/files/99395880677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0072/5141/files/pewdiepie_tuber_simulator_free_bux_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4678/3134/files/18340547184.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000af96.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAF96 27044 bytes
SHA-256: 4d3c32d3a7c25de56ccb53bc4af707599e08ff7a16a290f38ebdeb85ad6e4a4e
font_00_sfnt_off00007c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 4696 bytes
SHA-256: 404135a802a508c575b7e00b222961300bd2a7ad26d8daf0b482299aef8d1b42
font_01_sfnt_off00008c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2A 10380 bytes
SHA-256: 349bb58bb7bddc53d85b02210159160ea17dc08976eebb10403384ff56ee57e2
font_03_sfnt_off0000dfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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