Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7c0be3413090ce…

MALICIOUS

PDF

51.6 KB Created: 2020-08-27 12:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a04cd3d2c71ce8b5bc3eeb2cc73bb5b SHA-1: 66056b0ece838ed6c35dc82db59a7aa2adc231fc SHA-256: 9c7c0be3413090cec5726906666f536240ea93fc7250e53ab183f3a00e0b8431
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=kinobody+warrior+shredding+program'. The document body, though heavily corrupted, contains fragments suggesting a fitness program lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to malicious infrastructure.

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.
  • 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://ttraff.cc/pify?keyword=kinobody+warrior+shredding+program
    • http://files.juliakitokirtley.com/uploads/1/3/1/1/131163957/satorenemap-zezutulemu-xunodunor-fixibakalabum.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/vipopawamitisof.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/future_continuous_tense_worksheet_for_class_6.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/certificado_medico_cdmx_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/50168762460.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/sekovisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/ribuxilasonovoxikibonasun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/a_bad_mother_2018_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/93267274392.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/flow_chart_template_microsoft_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/banotume.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/42739052471.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008aaa.bin
be4845458d2456d65dbf48597cd9a57e20174861c697924bbefb8efa8498c359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAA 5644 bytes
font_01_sfnt_off00009dce.bin
2548d7c0ce36ff8519233bad807f253657876c9992204d07d6d665ae61eaa974		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCE 10560 bytes

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