Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9842ca1a7f152bd…

MALICIOUS

PDF

54.0 KB Created: 2020-08-30 10:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bd8c258d8f40d55ad7c72174776fb17 SHA-1: f4723d2618225316cba49e76f0dedfbb024e746a SHA-256: a9842ca1a7f152bd23c289a1fbb0c796f4c9f38ffae9cb0fd5f53ec11ca26134
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure ('Coyote swap guide') and the malicious URL. This suggests the document is designed to trick users into visiting a malicious site.

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.link/wix?keyword=coyote+swap+guide
    • https://static.usrfiles.com/ugd/b8c837_0561a2e460034c959b22db7c0ac2b6a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_109163e0a77c40919393e58b29782ac3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bf05d33aec643fbaf93c37a4d577458.pdf
    • https://static.usrfiles.com/ugd/3e87bf_d2b008dd74c54207aefb4f16ef2eb4f5.pdf
    • https://cdn.shopify.com/s/files/1/0452/4628/3937/files/analise_combinatoria_combinao_simples.pdf
    • https://cdn.shopify.com/s/files/1/0437/3489/2693/files/53938450572.pdf
    • https://cdn.shopify.com/s/files/1/0432/8069/5462/files/gogimanivanitejulonup.pdf
    • https://cdn.shopify.com/s/files/1/0439/6508/7902/files/garedofufevizomuramorala.pdf
    • https://cdn.shopify.com/s/files/1/0451/3821/5066/files/wedding_march_violin_solo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8022/files/integrated_science_2_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/gusefebufegener.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/bomurod.pdf
    • https://cdn.shopify.com/s/files/1/0469/3347/5483/files/living_environment_regents_june_2016_answers.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_off000097ad.bin
42cef025a868c038055c77f0e07f9f4f92c6e57634179ee7754aa2226f66e3b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AD 5100 bytes
font_01_sfnt_off0000a931.bin
63d050c84f7754782cc8b58b161b898aca5ae3c93b600bb2977cfa39d3ec4c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA931 10328 bytes

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