Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee95b6168c4a6bf…

MALICIOUS

PDF

38.1 KB Created: 2020-08-25 15:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72ce55e74987b9dab8c040471c92f1f5 SHA-1: 6ade03d7f0c498e6d214371428b668ab50b4ab5c SHA-256: fee95b6168c4a6bf9487d03a7e9956e7086d97b2be13f20965f9403401c48266
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=modern+chemistry+textbook+answers+chapter+21', which is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains, likely to obscure the malicious redirector. The primary intent appears to be directing users to malicious sites under the guise of providing educational material.

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=modern+chemistry+textbook+answers+chapter+21
    • http://files.karenmears.net/uploads/1/3/0/8/130874254/0e589251a5.pdf
    • http://lipewexet.msbennettart.com/uploads/1/3/1/3/131380591/54f64bbc8eaa.pdf
    • http://files.thijmendoornik.com/uploads/1/3/1/8/131871633/bobuxinarepesi_dadax_wewoxepa.pdf
    • http://files.dreamsnseams.com/uploads/1/3/0/7/130740141/xiwikesaximusap.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/118101445.pdf
    • https://cdn.shopify.com/s/files/1/0466/5887/9653/files/chakra_healing_sleep_guided_meditation.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/47424017617.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1590/files/formato_de_certificado_medico_sector_salud.pdf
    • https://cdn.shopify.com/s/files/1/0434/6111/6064/files/46315196491.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/cbse_class_12_datesheet_2015.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/social_media_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0449/8161/6808/files/armenian_power_spell.pdf
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/hashar_film_all_songs.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_off000053c2.bin
5ad7781200013aee8531430d6522cb3d232e40cc7277a5999435ee7b0ef00085		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C2 5936 bytes
font_01_sfnt_off000067ec.bin
1cfee16f25002935dfd3540edc4869e215d27ca6740325da74587e896675fd45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 10460 bytes

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