Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba171cb1a2299920…

MALICIOUS

PDF

33.8 KB Created: 2020-08-07 17:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94fa2d6967bfafe1455ed606cbb45298 SHA-1: 7f2df9bc410b1649910239bb2b301dc8d4cab600 SHA-256: ba171cb1a2299920583ed4f98770158c8c598ddd0f6d0a715c21b7ad2d5d465f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. This indicates the document is designed to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic suggests the document is part of a larger SEO manipulation effort to distribute malicious links. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=american+red+cross+bls+handbook+pdf', is the primary IOC, likely serving as a lure to a malicious site.

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.cc/pify?keyword=american+red+cross+bls+handbook+pdf
    • http://files.estherliano.nl/uploads/1/3/1/4/131407890/tejabakadazij.pdf
    • http://files.wayashealingpath.com/uploads/1/3/1/8/131856012/gemolafukotezevo.pdf
    • http://files.regentcommunitytrust.org/uploads/1/3/1/1/131163836/miwito.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/muwifegab.pdf
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/rejasapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5691/files/psychological_capital_theory.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/kajalobafig.pdf
    • https://cdn.shopify.com/s/files/1/0444/3511/2103/files/cash_audit_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/unity_on_collision_enter_2d.pdf
    • https://cdn.shopify.com/s/files/1/0446/7025/5267/files/harald_curved_greatsword.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/87521256862.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/34302045564.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/28510972195.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/41021778981.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_off00004620.bin
b2fa90f14c8e83cc7af04c32d1686423a9a6860af00938a093ef9ba8a5d4d7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4620 5588 bytes
font_01_sfnt_off000058eb.bin
1b0af6123fde929e18b6b3aeb51285ce42d4bb543307d64f79c2f9a5a0286cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EB 9808 bytes

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