Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25a49c709d0b0ca…

MALICIOUS

PDF

41.2 KB Created: 2020-08-06 08:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85b605a3fa558db187c3ff8fba3571ce SHA-1: e2d6c289662f5e5f45f88136cfe7e4941c2f329a SHA-256: d25a49c709d0b0cab8950c0d4f2ee466926891e5cbd5816b75e3577a62fa721d
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.ru. This suggests the document is designed as a link farm to distribute traffic to malicious sites, likely for phishing or malware delivery. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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=acgih+exposure+limits+pdf
    • http://files.limassolsportsmassage.com/uploads/1/3/0/8/130874129/laxuvovobopekidom.pdf
    • http://wutuwu.unorthodoxmotorsports.com/uploads/1/3/1/6/131636612/4e82f50191.pdf
    • http://files.shhschoir.org/uploads/1/3/1/6/131636697/7553665.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/bivutuxuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/bibewoxo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/69490757761.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/99307664260.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/98437083339.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/rarik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/66418597264.pdf
    • https://cdn.shopify.com/s/files/1/0431/3851/5095/files/38451192068.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/44576576672.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/cezar_roberto_bitencourt_tratado_de_direito_penal_parte_geral.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/puxapunopakunanubumojip.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_off00006242.bin
0eb20765a99a7ad89d94d6e4ac90a79cd5a2c2c94a2fb76dd4e053bd53c1bc34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 5416 bytes
font_01_sfnt_off00007491.bin
4482ca75f85141b52409c2c02e83705ffccac04aa8b952a4efb9fd0b5d411e05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7491 10544 bytes

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