Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d67468efda81c0…

MALICIOUS

PDF

44.5 KB Created: 2020-08-30 16:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8453dede8ce8ad6773d5ad7b1f52e0f8 SHA-1: 5d499a6fa01591daefdaa2709c7e2507dd4dc413 SHA-256: a9d67468efda81c02761705529e60a12027964e2ad030408d838b9cba8293beb
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.me'. This indicates the document is designed to redirect users to malicious sites. The presence of numerous PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the primary attack vector is the embedded malicious 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.me/wix?keyword=accounting+information+systems+romney+pdf
    • https://static.usrfiles.com/ugd/accd1f_9f3ad741234944528e22eecba0208421.pdf
    • https://static.usrfiles.com/ugd/73cb9e_c03b012ed7fc4ecb951f38a9b76bfaa3.pdf
    • https://static.usrfiles.com/ugd/253000_18147c0b40af4ba6aee7257effcbead2.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/best_ar_15_speed_loader.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/durebepefolisikiza.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/contraccion_isotonica.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/lirobomumumodimonasug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0055/files/calculator_soup_greatest_common_factor.pdf
    • https://cdn.shopify.com/s/files/1/0430/4034/2169/files/convert_adobe_acrobat_reader_to_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/422907466.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/sat_math_no_calculator_section.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/86345576434.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/kuguwoxoxesibimidemo.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_off00006e78.bin
f4bfd72eb402d5c4c7b94ba5dac92601f55a48acc3c488118ca2e0bc6037775b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E78 5536 bytes
font_01_sfnt_off00008137.bin
dddd412d9a8eb5734ee84d140b2295c9526c4bc836fe9cdeb6e80e7bf1193e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8137 10716 bytes

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