Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7b6efbd280b271…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 15:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 615b9008a45ebf50e2a55314d8f4af43 SHA-1: 8620802f1365aa87278c3bf3ed6e7bae55e5dc03 SHA-256: 9b7b6efbd280b2712acd28d262becda20b53d0abebad3d63a6264c347ab6d8e0
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=affairscloud+gk+capsule+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a social engineering attempt to drive traffic to potentially harmful content. No scripts were extracted, limiting the analysis of direct payload execution.

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=affairscloud+gk+capsule+pdf
    • http://files.htdignam.com/uploads/1/3/0/7/130738753/2010635.pdf
    • http://pidemoja.balancedpets.ca/uploads/1/3/1/4/131453540/2691372.pdf
    • http://files.aforcapacity.org/uploads/1/3/1/6/131607063/29beea.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/25866593560.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/dulavegufuwogova.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/budupitifeguk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7701/files/kopiwuto.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/barimuxoxilodabuwi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/fovudabutorukopolenamazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/wonenimadepumom.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/suvogusonawode.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/fevuxikonegigovibej.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/linux_beginners_guide.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_off0000653b.bin
c92ef18abc3bf4294667ec60c568cbe4f62c60e3b6663a802d6688407ce861ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653B 5376 bytes
font_01_sfnt_off0000779c.bin
7bb964d8bfebb5cb941710b66e671b6721b05c212708fadadf8231c310734002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 10532 bytes

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