Malicious PDF — malware analysis report

Static analysis result for SHA-256 4164b63fec8cd734…

MALICIOUS

PDF

35.9 KB Created: 2020-08-27 20:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ece63227bfc2bd794c9dfbf604f5a18 SHA-1: 55b79ed82cde1f048af9771c5b3c7c55cb9ba8ba SHA-256: 4164b63fec8cd7348678cb33822b5bb53de7de0b66e2d78bd70088cda5dffbd5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link. The document body text, though heavily obfuscated, appears to contain keywords related to a workshop manual download, which is likely a lure. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=vauxhall+vectra+c+workshop+manual+free+download
    • http://files.meredithroadrep.com/uploads/1/3/0/7/130740586/foxunasibeja_soxoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86593634255.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/61144918724.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8173/files/converter_em_jpg_online_gratis_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/30547831232.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/jisusivokut.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/bed_bath_and_table_deer_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0438/3201/7058/files/78873902583.pdf
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/38532771084.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/17406413662.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/true_colors_test.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_off00004e00.bin
a524e4ce8a29f44c9f45cee2f6d5f08fa27f78ef8b6da083d2b1084719304fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E00 5644 bytes
font_01_sfnt_off0000612b.bin
08cbb70f1c5d403c77a79996fe6647bde8012522e66956f5a646ad6b7ef57b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 9824 bytes

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