Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2893ccc631a8bd…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 02:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f57052e881fcbbdbaafa98d61bd0e8f SHA-1: e6c05b84ab454c14e531156b3703f588f329e6a4 SHA-256: 4a2893ccc631a8bde9208fb97a02f7bad3a9f4ee6390d06a8de9ef6adf1535f3
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 critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented in the document body with a lure related to "baby trend replacement parts". This indicates a phishing or scam attempt designed to redirect users to malicious sites.

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/wix?keyword=baby+trend+replacement+parts
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/ranavop.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/arduino_uno_lcd_display_project.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/88536787265.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7454/files/transformer_voltage_regulator_avr.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2115/files/89527676032.pdf
    • https://cdn.shopify.com/s/files/1/0435/2845/4298/files/monaru.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/45976320144.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/rachmaninoff_prelude_in_g_minor_piano.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/98153532798.pdf
    • https://cdn.shopify.com/s/files/1/0437/1772/2280/files/titan_mens_room.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/convert_psd_to_png.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/unix_commands_interview_questions_and_answers_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/54558591564.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/84803795154.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/spatial_database_with_application_to_gis.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_off000064f1.bin
37f94e95295b094e99eafa3de643e4a62f14fef1aca1d18a2df6372f60604441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F1 5512 bytes
font_01_sfnt_off0000778c.bin
924170a23d8c0ad5f95488f7d30bfc6d3b569e38f028d0eea84d311f3ad0b5ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778C 10704 bytes

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