Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f267fa65172d27…

MALICIOUS

PDF

46.8 KB Created: 2020-08-01 13:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a825c03de4ec5255bd6071b295c1ca0 SHA-1: 01fc593621fa5a1ebf73717be069fc1037e9b183 SHA-256: f3f267fa65172d2752a9020fbe15eb50f4a5a6adf5c0956c5f3ba5219083ec14
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document body itself contains the text 'Kannada sex stories' and numerous links to external PDFs, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly indicated maliciousness.

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=kannada+sex+stories
    • http://files.motherhooduncorked.com/uploads/1/3/1/8/131872105/kovurozu_dawugomak.pdf
    • http://files.kawaiimautio.com/uploads/1/3/1/4/131453206/nimik_pijilojibo.pdf
    • http://files.creativechickclasses.com/uploads/1/3/0/7/130740148/6529725.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/37587242715.pdf
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/73831913612.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/gujofaresagev.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/wigusoritugusadabazolir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/37231789051.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/lemodugos.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/14251767807.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/gimerosigagidodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2089/3864/files/julek.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/lofegopunewezomoxekito.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/74472101157.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_off00007bf4.bin
347f5338d934887605fb8f17c8a9546ccb1e604b49cbbea46f54ca93dd87bf53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF4 4824 bytes
font_01_sfnt_off00008c6e.bin
24b9bc8e9cd6f811b55933fe7f01a515c16fcb866483f2c409a97ea344ac8bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6E 9948 bytes

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