Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f890c3397f9200d…

MALICIOUS

PDF

46.6 KB Created: 2020-11-02 18:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a4db46a950907f93d77dfd31fd72c04 SHA-1: 7400359a8196db0b94ccbaaa7b251723d7bb3c29 SHA-256: 0f890c3397f9200d3f1afcc21390d237b30e64c8dc45ece1a1781d9959eb5446
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a high number of embedded links, many of which point to redirector infrastructure. One of the primary links directs to 'gettraff.ru', a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a link farm or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?keyword=seaward+25+review
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f8a56f3b3751.pdf
    • https://cdn-cms.f-static.net/uploads/4381766/normal_5f99adcccd624.pdf
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8d0edd3e9f0.pdf
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5f9ff738821a0.pdf
    • https://titamifafipife.weebly.com/uploads/1/3/4/3/134315234/6c2a64.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jafujasiwetid/labazodekeritasab.pdf
    • https://s3.amazonaws.com/debamijizozexo/wubiluv.pdf
    • https://s3.amazonaws.com/luvamekonivoz/siesta_key_cast_names.pdf
    • https://uploads.strikinglycdn.com/files/08a383db-bf69-47b0-abd6-1c00ac900cbf/5819538149.pdf
    • https://s3.amazonaws.com/mijedusovineti/nafipofobipasorixolof.pdf
    • https://s3.amazonaws.com/purawuma/mrs_garrison_south_park.pdf
    • https://s3.amazonaws.com/sevoga/rozutuvilemiso.pdf
    • https://s3.amazonaws.com/zizene/25332148404.pdf
    • https://s3.amazonaws.com/pewebopufupe/balanza_de_pesos_muertos.pdf
    • https://s3.amazonaws.com/wujapu/22731923595.pdf
    • https://s3.amazonaws.com/gifiz/coca_cola_chest_cooler_models.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ceb.bin
f43aff634f029c642227f4d1b77edb7d371f384400c645ccbb347caaaf5f90e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEB 4612 bytes
font_01_sfnt_off00007caf.bin
dcc09ac1ba56af81c42cf344e03597ad449fc8b08445d7a5e73f73557eec4480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAF 10244 bytes
font_02_sfnt_off00009fbb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBB 4324 bytes

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