Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dc6858629bc408…

MALICIOUS

PDF

37.7 KB Created: 2020-07-28 04:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ca7d7f2b0ea396a8776c3be3f11a1f5 SHA-1: eb7a774ba122c609ec93e02624c3487b772108e3 SHA-256: d0dc6858629bc40802b386de31fa99ed75684d82361d181d85664f2fc7ed4083
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm to improve search engine ranking for malicious content. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of numerous links and the redirection to a malicious site strongly suggest a phishing or malware distribution attempt.

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=alter+ego+1+workbook+pdf
    • http://files.shoptrunnellsfarmmarket.com/uploads/1/3/0/7/130775286/5236563.pdf
    • http://files.facesofjanine.com/uploads/1/3/1/4/131438228/vexazenut.pdf
    • http://files.vocationaleducationwaiahole.com/uploads/1/3/1/4/131410479/9581018.pdf
    • http://files.facesofjanine.com/uploads/1/3/1/4/131438
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/48393013056.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3645/files/kivugakuwolenako.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/5206744633.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6619/files/20014700388.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/nudigopowobetavilanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/57835318310.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/99894505659.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/60806786310.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/nirazijodemisa.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_off0000577c.bin
80616e8b014e8a04c0906b1de2ffc5c8b8b7f01f1a4da1872e19e81e69741d5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577C 4792 bytes
font_01_sfnt_off000067f6.bin
53ca9315f9608706712362c9516a98b406fb337c14da5037531ef6c8eb5b01f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F6 9952 bytes

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