Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e22077c7f28f0e…

MALICIOUS

PDF

34.0 KB Created: 2020-08-12 05:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ba7fef5a32634286a41bddd67c6289c SHA-1: 3f5ce9301fcee1c24873b6ca80e670fcd8283dc6 SHA-256: e3e22077c7f28f0e22f96e998f40ff71c29a1abfa0a40b9b6eae1a2da96e5f9b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=cracking+the+sat+math+2+subject+test+pdf`. This URL is presented within the document body, disguised as a link to a SAT math test preparation PDF. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, likely intended to mask the malicious redirector. 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=cracking+the+sat+math+2+subject+test+pdf
    • http://files.entrecontinentes.com/uploads/1/3/0/9/130969045/zunutusitusubesejof.pdf
    • http://woremaso.fairleelibrary.com/uploads/1/3/2/3/132302872/73913b1dc6b79.pdf
    • http://files.kingdommovementglobal.org/uploads/1/3/0/7/130739616/939609acd0f.pdf
    • http://files.authorcaseypeeler.com/uploads/1/3/0/7/130740349/534dc711a6ca2a.pdf
    • https://cdn.shopify.com/s/files/1/0453/9623/0312/files/addition_worksheets_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/3020459744.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/arabic_vocabulary_words_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/frases_en_ingles_mas_utilizadas.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/vitijuxixifowesazapexo.pdf
    • https://cdn.shopify.com/s/files/1/0447/8061/7885/files/new_cutting_edge_elementary_workbook_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/ximegurekegenuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/9635/0624/files/ejercicio_isotonico.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/punipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/doxuvomuzivogixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/46519446503.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_off000045b9.bin
f778254c20926a9917b878f3d99d6d714677c66c597fa5e764f88403b5f2d7f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45B9 5852 bytes
font_01_sfnt_off00005973.bin
2434eac911abf8c4d140c046bc622ad62a465605de5db44a46237d98ad5bf670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5973 9884 bytes

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