Malicious PDF — malware analysis report

Static analysis result for SHA-256 2352de07a69d231a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 08:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5faf4767bb7021c28be46fd7f4e5b23c SHA-1: e074a2f95bd523bd29235308133d8806231fa5ae SHA-256: 2352de07a69d231a363cb403300ec8fbc616ff52f85b3f631c4a111fb27fc2a0
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though partially corrupted, also contains the URL 'https://ttraff.ru/wb?keyword=capitalizing%20titles%20worksheet', which is flagged as malicious. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic, potentially to obscure malicious activity or distribute further payloads.

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/wb?keyword=capitalizing%20titles%20worksheet
    • http://tosibuno.hausofgary.com/uploads/1/3/2/6/132681946/8dee4c1.pdf
    • http://files.crookedcreekfarmsvalpo.com/uploads/1/3/0/8/130814279/vexejusatupowu.pdf
    • http://files.thebrionnarenee.com/uploads/1/3/1/6/131606603/46fde18d753c1b4.pdf
    • https://cdn.shopify.com/s/files/1/0432/2462/9411/files/jikalanetenonok.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/wuxowujakelagulunamoku.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/alumbrado_publico_con_paneles_solares.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/56500563917.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2485/files/kusazipenidagomobifuji.pdf
    • https://cdn.shopify.com/s/files/1/0436/2777/4115/files/42367525172.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/42635060351.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/52443456095.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/34689433493.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/wave_incense_pixelmon.pdf
    • https://cdn.shopify.com/s/files/1/0438/0481/9613/files/computer_full_form_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/weekly_study_schedule.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_off000066a6.bin
eb68a306521fabe17c6be8f32ab6b2bd32eab3528fa9d52e443535699d263cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A6 5192 bytes
font_01_sfnt_off00007862.bin
28350a59368ff011713365f540428704c771b60ab9e4d7fed904e88b04229aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7862 10240 bytes

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