Malicious PDF — malware analysis report

Static analysis result for SHA-256 120fa7ed4c003cda…

MALICIOUS

PDF

48.0 KB Created: 2020-11-03 16:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7de7c9b904e8c77b5cae68ed1cc665a SHA-1: a4665870a00d1362c7d1f652e5b3947c8a573557 SHA-256: 120fa7ed4c003cda750af899f1c5a7e8d1a1160555d4f3881329ca663e00bd9d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://cctraff.ru/strik?keyword=tabernacle+prayer+guide+mangun'. Another heuristic flagged the document as a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • 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.
  • 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://cctraff.ru/strik?keyword=tabernacle+prayer+guide+mangun
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdf
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8e402e37fd4.pdf
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f8c3824be8d0.pdf
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8d84f59626e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jamokaroxoj/statistical_methods_for_agricultural_research.pdf
    • https://s3.amazonaws.com/tigovatolis/cricket_information.pdf
    • https://s3.amazonaws.com/somamere/30969293419.pdf
    • https://s3.amazonaws.com/ninasivol/monkey_defense_5.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/amazon_aws_tutorial.pdf
    • https://s3.amazonaws.com/tabobujimo/zowaz.pdf
    • https://s3.amazonaws.com/wujodibu/ps_i_love_you_google_drive.pdf
    • https://s3.amazonaws.com/xojafemori/st_francis_xavier_catholic_church_cresson_pa.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a2bc.bin
498f76f88feae3570c6aff14abd0b0e30001761b9a04ee0b86b31c0dac04b07b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BC 5096 bytes

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