Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad724d4cb47bbec2…

MALICIOUS

PDF

33.0 KB Created: 2020-08-25 03:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc88cd7abf85f7de36bd797dd690630 SHA-1: 59b6764b0f498f0ce175ce2d796bfb35ac980739 SHA-256: ad724d4cb47bbec27ee8fb5c15666c37410996ee8382333ce8900f834ade1339
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://ttraff.ru/pify?keyword=brighton+college+prep+school+uniform', is flagged as a malicious redirector. The document body contains text related to this search query, indicating an attempt to trick users into clicking the malicious link under the guise of relevant information.

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=brighton+college+prep+school+uniform
    • http://files.grassyknollfarm.com/uploads/1/3/1/1/131164250/kamepitifad-fivanokigonuxo.pdf
    • http://ditew.joshphilpott.net/uploads/1/3/1/4/131413418/3c270b9ac98.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/bezikowixujopiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8594/5246/files/argumentative_communication.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/50856833518.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/goruge.pdf
    • https://cdn.shopify.com/s/files/1/0439/5276/7131/files/yearly_gantt_chart_excel_template_xls.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3687/files/basics_of_python_3.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/12945665337.pdf
    • https://cdn.shopify.com/s/files/1/0435/1528/1568/files/fallout_4_material_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/carnatic_music_senior_book.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_off000044ed.bin
d5719afee73e314946fe52b7acf4e04b80bbce1889e25a758b6d3821c31228ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44ED 5268 bytes
font_01_sfnt_off000056b6.bin
cda166d5017970ab3a2573a67354d8d319b0b85d8513aa3ed169a4ff277c55b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B6 9588 bytes

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