Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbc57860d8f7e61…

MALICIOUS

PDF

46.4 KB Created: 2020-08-07 04:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d82eaa84a870048044063072bd26e76 SHA-1: e43e9fb5fbb7e99fd490ca0c072da64ffd3a1de7 SHA-256: 8cbc57860d8f7e6126a1494c6c04440de7cd2850c8252c579289693e6b8e0fab
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the text 'basic chemistry test and answers pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous PDF links indicates a strategy to distribute malicious content or engage in SEO manipulation for traffic.

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=basic+chemistry+test+and+answers+pdf
    • http://files.fluid-venting-system.org/uploads/1/3/1/4/131407080/tagil.pdf
    • http://files.kinderdanceaustin.com/uploads/1/3/2/6/132695747/gamosuniwava.pdf
    • http://files.jasondry.com/uploads/1/3/1/4/131437864/8627388.pdf
    • http://files.ecosattvasangha.org/uploads/1/3/1/4/131482931/3349ad79fe7585.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1376/files/tapigozefelap.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/xivalusowutoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/koduloporurerubivugorewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/6028315350.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/apostle_paul_ministry.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/wuvonesadasegedisulabale.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/zibijemutivupowagesali.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/zofepoxolesinoguwodisis.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/11791271137.pdf
    • https://cdn.shopify.com/s/files/1/0435/5558/6203/files/mipuma.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/97370358202.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_off000074cc.bin
ad96201ef4e4730b66e9841a7cf2ad6ba60306f05af5614c3ea373f32c42f01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CC 5604 bytes
font_01_sfnt_off000087ca.bin
6eea9b66c763d0ddaa0ce26e36d26bbf116693d9ce1ebbecd2693a7b9f5b0cff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 10740 bytes

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