Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04458f56e9d78b5…

MALICIOUS

PDF

35.0 KB Created: 2020-08-21 00:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e18746b74673a8e8dbea7a4fd54a6da SHA-1: 109579d96fdf8a02111e6bbdd009e6b04d5c4e29 SHA-256: c04458f56e9d78b58cc37b82a486b15f033427c6dec3a26f7c340538dc242751
120 Risk Score

Malware Insights

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

The PDF contains a large number of links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is presented as an oscilloscope user manual. This indicates a likely phishing or malware distribution lure. No scripts were extracted from this sample.

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=oscilloscope+user+manual
    • http://daxufuzum.menomoniesaddleclub.org/uploads/1/3/0/7/130776659/gapozakenudi.pdf
    • http://files.cganim8tion.com/uploads/1/3/1/0/131070113/nesazivivafemakodusi.pdf
    • http://files.integraltrainingllc.com/uploads/1/3/0/7/130776413/6394342.pdf
    • http://files.teacherswritenow.org/uploads/1/3/0/7/130740571/wobax.pdf
    • http://files.aplincookgardner.net/uploads/1/3/0/8/130814205/5797772.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/bornoporichoy_1.pdf
    • https://cdn.shopify.com/s/files/1/0440/1840/1430/files/bosquejos_evangelisticos.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/27717962877.pdf
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/95589237449.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/icnd2_commands.pdf
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/futunikupumusugan.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/visiting_card_format.pdf
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/5707580453.pdf
    • https://cdn.shopify.com/s/files/1/0433/4868/9050/files/2758594907.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/vedubowezofopupolokip.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/68617481684.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/car_diesel_engine_parts.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/93041336846.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_off00004c4a.bin
ef7a1e2147c52b1ed2437200f46e5b5f9770936940642d888c9f3ecdb2888fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4A 5104 bytes
font_01_sfnt_off00005d83.bin
cf423ec2a7dd3ea6ac606bf0ec3a48cc251af597718057a529acf5bdda4c8c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 9976 bytes

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