Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65696ef0859ec92…

MALICIOUS

PDF

77.0 KB Created: 2020-08-12 02:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05dc4a3eb41209c6b16a7519399b0d96 SHA-1: 3ec0dbe87320ef7ff74995830efdcc32f8fbe787 SHA-256: c65696ef0859ec92c5b8232a6da15d441ca2f8ff51116b919aaddedb36bed9dc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=power+amplifier+circuit+pdf', is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation to increase visibility.

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=power+amplifier+circuit+pdf
    • http://sokaxid.leroykoh.com/uploads/1/3/0/8/130814328/jutotafuju-vuvewa.pdf
    • http://files.livingwellwholefoods.ca/uploads/1/3/1/6/131606859/4061288.pdf
    • http://files.yorkstone.ca/uploads/1/3/2/6/132682030/bunesederubipu.pdf
    • http://migade.icbnz.org/uploads/1/3/1/6/131606066/b719c6.pdf
    • http://files.caringforcottontails.org/uploads/1/3/0/7/130739892/a21aebed75683.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/39895950624.pdf
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/difatimekofilotego.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/cavs_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/9124/4696/files/30285240911.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/ethanol_production_from_sugarcane_bagasse.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0051/files/pufuxepiwiwuwofukasujuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/23955171187.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/78207810588.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/nekefulepavomuzon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9232/9116/files/27061468818.pdf
    • https://cdn.shopify.com/s/files/1/0431/3205/9810/files/24744287433.pdf
    • https://cdn.shopify.com/s/files/1/0435/2291/6520/files/289590765.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/fijazapaponurema.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_off0000f277.bin
88ec12e0667095f74766b0214e05c70455ca4456cfd36f5d64b86ba79a969d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 5216 bytes
font_01_sfnt_off0001042c.bin
9f44fcc6d1f60834adebaf88e973b20b891b5c776dc9601d75995c50ea400d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1042C 10088 bytes

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