Malicious PDF — malware analysis report

Static analysis result for SHA-256 307599c92f8cb045…

MALICIOUS

PDF

38.8 KB Created: 2020-08-26 00:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c21833ca05932e663e09bb7486ed0a3 SHA-1: 94e6c4a2ff063273e32492d7390893d6566668cc SHA-256: 307599c92f8cb0451bd03ea4b9583fbdd21cee689b20254adbf0e89b95ed48a3
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body text, while partially corrupted, includes a URL that appears to be a lure for a book title. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to known 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.com/pify?keyword=trail+guide+to+the+body+5th+edition
    • http://files.ophthalmic-instrument.com/uploads/1/3/1/1/131164024/falemuj_tavamebanowuru_tuxineba_bifulibijudimu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/bend_or_break.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/drugstore_cowboy_script.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/monosalawuzul.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4109/files/92291349821.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4550/files/responsive_checkout_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/lazoruvefeluwanol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/60787945520.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9367/files/mowalidinilapedaxomudomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/suwovo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3880/files/avent_naturally_express_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1304/files/lefasewukezeluxeg.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_off00005843.bin
306f96e24ad618088f60cb2f70aacb97460e98df9b714797072c4cc7f56f9731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5843 5224 bytes
font_01_sfnt_off000069ff.bin
ae5b8c5021a47d82c5ffbc6704813f2c993de6aa368e6127556ad54df0f18ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 10740 bytes

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