Malicious PDF — malware analysis report

Static analysis result for SHA-256 a227d359b3ca35a8…

MALICIOUS

PDF

39.3 KB Created: 2020-08-25 05:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e57f88a37e223bd182f0cceac4af302 SHA-1: a424c1555213f2820c5e4e638db8cda96a8c013f SHA-256: a227d359b3ca35a8c0c3e72b00d8a6af3f29cf0e728f16bc9aa519255706d997
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to improve search engine rankings, with one prominent link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=volume+booster+windows+7', suggesting a lure related to system optimization. The presence of numerous links to Shopify-hosted PDFs indicates a broad campaign, likely for SEO poisoning to distribute malware.

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=volume+booster+windows+7
    • http://files.roguehorsestudio.net/uploads/1/3/1/3/131384638/699af0cfb612b12.pdf
    • https://cdn.shopify.com/s/files/1/0435/1832/8991/files/medical_office_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/lewakugoxar.pdf
    • https://cdn.shopify.com/s/files/1/0448/3029/4177/files/gisorudojapekopimusupib.pdf
    • https://cdn.shopify.com/s/files/1/0461/9675/2534/files/la_voiture_noire_bugatti_performance.pdf
    • https://cdn.shopify.com/s/files/1/0434/8782/1984/files/bumurimenodevofazuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/71800489816.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5237/files/furuncle_and_carbuncle.pdf
    • https://cdn.shopify.com/s/files/1/0450/1933/2766/files/alimentacion_escolar_saludable.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_off00005d61.bin
67aef6d6143d38bb51cc38b12718452b1adb2f436163b94c61e5844bfdd87901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D61 5040 bytes
font_01_sfnt_off00006e89.bin
ae026d424ee6b4207d0b18c89063661f3a1229c8fedc2dd561ed80161726e127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E89 10080 bytes

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