Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04e9f6d740e6277…

MALICIOUS

PDF

43.4 KB Created: 2020-08-15 16:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63e50db81f27a28410ea2367f5a66d49 SHA-1: 43db188dbba062eb7349ca8214bda02197fd95c3 SHA-256: b04e9f6d740e627759e88d4dd9307c09ac05173d93df62bd06daf9c36527a0d6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with this finding. The presence of numerous embedded links, many pointing to Shopify domains but some to unknown domains, suggests a link farm or redirection strategy. The primary malicious URL identified is https://ttraff.ru/wb?keyword=nuevo%20codigo%20procesal%20civil%20costa%20rica%20pdf, which is likely used to redirect users to a malicious payload or phishing page.

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/wb?keyword=nuevo%20codigo%20procesal%20civil%20costa%20rica%20pdf
    • http://duzuw.nathannasbymusic.com/uploads/1/3/2/8/132816066/nomaserudulenolu.pdf
    • http://wuzuwa.phdoodlesco.com/uploads/1/3/1/3/131383544/vakarubedalipega.pdf
    • http://files.stayblooming.com/uploads/1/3/1/6/131637131/dilapirawaliwuvif.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/38768960925.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/43310261407.pdf
    • https://cdn.shopify.com/s/files/1/0436/1483/0749/files/roparipinupofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5250/7036/files/8526550811.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/dikuwevobofif.pdf
    • https://cdn.shopify.com/s/files/1/0449/4072/2331/files/50225020533.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/94434807313.pdf
    • https://cdn.shopify.com/s/files/1/0430/6613/0593/files/xegagojububo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/26394407698.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/fokidafenapuwun.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/xitezoz.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_off00006ad4.bin
b32bd3a658d6907d04014c2aaed77361562d35cdc6634e0f1822c5a328972343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD4 5352 bytes
font_01_sfnt_off00007d27.bin
27a75df9aec50d1572e375bee47c87a2100d51ec00394d8e860b764d4b2e9a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D27 10368 bytes

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