Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df64d86de59cc91…

MALICIOUS

PDF

39.8 KB Created: 2020-08-02 16:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8b3c1ab8fa34afb9380221de1e4ce91 SHA-1: 8271def8697bc2777ad060340984fcea27689a3b SHA-256: 1df64d86de59cc919a9f84128bbf2cb6fdbd439de764592baeb21900cd31dc39
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of embedded links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=css+box-+shadow. While no scripts were extracted, the sheer volume of links and the critical heuristic firings strongly indicate a malicious intent to redirect users to harmful content.

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.ru/pify?keyword=css+box-+shadow
    • http://files.discourse-x.com/uploads/1/3/0/8/130873876/2ee7f760bb0.pdf
    • http://files.bloodsugarbikemagic.com/uploads/1/3/2/8/132814958/6480127.pdf
    • http://files.armantherapy.com/uploads/1/3/2/7/132712057/kuzomowakapubomofok.pdf
    • http://files.shreveportchamber.org/uploads/1/3/2/6/132681901/vekatilijojipefiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/dark_souls_2_hollowing.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/ribetivuzigolapopal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/fipifasukexazevixol.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/5888658952.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/11568380646.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/34447714134.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/how_many_emotes_per_sub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18813115042.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/30796611073.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zexula.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/97006934754.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/bilovapuvutusunixavebisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/54537404108.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_off00005cd8.bin
86ce94f2c9aba1a4fa31fd5b61627ddeaa3f72c25681d60162524026d6367752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD8 5020 bytes
font_01_sfnt_off00006dff.bin
76d18d57a9518bc02cf7befb26cfd25414ef73c93e29efe1421ebeb2702a0c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFF 10832 bytes

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