Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21a0fc3d6e5791d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-17 11:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71f491e3537cb01307de1f4a2d75f469 SHA-1: 71a25b9c038dc2ca6087f00e11eed7321b7aa59d SHA-256: d21a0fc3d6e5791deb172257c54d7f68cdb70cf75abbb1589455105c6b6c3fbb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=the+whole+brain+child+ebook'. This indicates a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to an ebook and the authoring application, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further supports the SEO link farm heuristic, often used to disguise malicious content.

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=the+whole+brain+child+ebook
    • http://files.worldheritageconsultant.com/uploads/1/3/1/6/131607943/4556d09887e08a9.pdf
    • http://lobureb.hjbandboosters.com/uploads/1/3/0/7/130739456/345938.pdf
    • http://files.niwawriters.net/uploads/1/3/1/8/131872107/2c2f0.pdf
    • http://files.ni
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/mice_and_mystics_lost_chapter_cat_s_cradle.pdf
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/mathrubhumi_calendar_2017_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/jirejabexijereg.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/voxazidepolorod.pdf
    • https://cdn.shopify.com/s/files/1/0428/7338/9223/files/35287482025.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/simple_present_tense_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/introduction_to_discrete_mathematics_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/jeziwatusesigutojun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9970/0889/files/rajiwanube.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/sheet_metal_gauge_conversion_chart.pdf
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/76198749139.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_off00007397.bin
534115a24cfcadff54ab8d0adfed3cf86150047b8d07cbd5813aefa3f3058298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 5092 bytes
font_01_sfnt_off000084eb.bin
9fc01d30f06022aa6c1108407fbbc88b693168e9b41a7185ccda262084416dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EB 10696 bytes

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