Malicious PDF — malware analysis report

Static analysis result for SHA-256 8686cfa1f8bbd166…

MALICIOUS

PDF

39.2 KB Created: 2020-08-16 21:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c4625888c4dc91150ee740043dcfb8 SHA-1: a19848954f94253473f8f302814305ed271d5881 SHA-256: 8686cfa1f8bbd1667b86bffb9638b84250103fa74dabd9fef954e86de261873d
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/pify?keyword=hydroquinone+msds+sheet. The document body, though heavily obfuscated, contains this URL, indicating the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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=hydroquinone+msds+sheet
    • http://files.kamelotrose.com/uploads/1/3/0/8/130873995/6741464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/xituzumineniw.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/tired_anime_boy.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0714/files/29274465958.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/tofulidezulukokibetizinel.pdf
    • https://cdn.shopify.com/s/files/1/0435/7763/9071/files/algebra_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4491/files/certificate_of_australian_origin_form.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_off00005bb3.bin
ea0fe71566187642018f25c4dd6479cf04056e7ef338441e08e6aac38413314e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB3 5012 bytes
font_01_sfnt_off00006c93.bin
b5db2bc904e087404b960d05995588a63ef7494fc36387a7b443e2e97f868876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C93 10668 bytes

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