Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91d596785a80263…

MALICIOUS

PDF

38.8 KB Created: 2020-08-24 09:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a237e8e7ffa7435fca609efb93feb4f SHA-1: 29cb7563b3018d9479e804555b2532a72cfb82f8 SHA-256: d91d596785a802632b3279f067b7812ffbfbdc69a3a001c23e923fc3bcbb768b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Qld health induction of labour guidelines', likely a lure. The PDF also contains a large number of embedded links, many hosted on Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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=qld+health+induction+of+labour+guidelines
    • http://files.cherylblackford.com/uploads/1/3/0/8/130813898/4157698.pdf
    • http://files.martinebailey.com/uploads/1/3/1/8/131856318/xalafumumuwol_wezuguj_zujigul_bixevig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/zuguzesidakijuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3300/9047/files/88027454379.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/d_d_4e_player_s_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/angularjs_datepicker_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/59641632014.pdf
    • https://cdn.shopify.com/s/files/1/0431/6066/6274/files/95566612086.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/automotive_part_interchange.pdf
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/52612534664.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1774/files/aristotle_poetics_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/99612817152.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8789/files/9405884080.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_off000059e9.bin
ac3802d6f782f04c10712ae9bd0fe8a3ac9c4a80d5df1d1d705273d1a0a9b07e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E9 5484 bytes
font_01_sfnt_off00006c7f.bin
ba1961dfbe3fbcf8ecbfb54aca5fb4146aa2773668dc24b01f1bbd297e7c7658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7F 9900 bytes

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