Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b61ffba8ae53a4…

MALICIOUS

PDF

42.3 KB Created: 2020-07-31 15:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d934688b80320a4cdcb05003f6c31b6 SHA-1: 3ed7f6d01dc3ef242e7558f0ec5e7280f56922b8 SHA-256: 86b61ffba8ae53a448a4f9c2dfe74eb8ec707c230a0af1b60ac422f3599fa721
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary URLs, 'https://ttraff.ru/pify?keyword=dish+dash+milpitas', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Dish dash milpitas' and wkhtmltopdf, suggesting a lure. The presence of numerous Shopify-hosted PDF links indicates a coordinated effort to manipulate search engine results or distribute 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=dish+dash+milpitas
    • http://files.kimblevins.com/uploads/1/3/1/3/131398335/gamaxoweliluvem-zokoxexada.pdf
    • http://files.berksartalliance.com/uploads/1/3/1/3/131383602/fcf355f334004.pdf
    • http://files.conspiracycentral101.com/uploads/1/3/2/7/132710756/fevipegurulomir.pdf
    • http://files.balqeesline.com/uploads/1/3/1/4/131409761/buviroremog_gejabanipuzofav.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/jedexerulilatapage.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/gozalobedobigejeso.pdf
    • https://cdn.shopify.com/s/files/1/0431/1672/4386/files/53121356977.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/vuwabuzanesuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/nitudopotasidepibozola.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/xesitelasisiro.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/1223863389.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/demoxogibup.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/sebuvamavel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/26997849272.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/72765909276.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_off00006b23.bin
8b0d5ae411dd9edd3e5feacc0525f520cf1ea8253904494b9e7005c8a740fce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 4556 bytes
font_01_sfnt_off00007a92.bin
d5a9e5e41c3e8d9146e265f0dafe71304d017f7d9c46367fedaed55715901b76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A92 9960 bytes

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