Malicious PDF — malware analysis report

Static analysis result for SHA-256 3907bb7cd6ad594f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 16:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0b21614e110621dd7055e286c33e72a SHA-1: ed4203a8b1c9c66fa7fa2b55d194b1be70f4acad SHA-256: 3907bb7cd6ad594f48fe790f3520184d44efbfcf829e994ed30d788e0b39eadd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a printable alphabet guide. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL point to ttraff.ru, which is known for malicious redirection. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious distribution or phishing intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=abecedario+en+cursiva+mayuscula+y+minuscula+para+imprimir+pdf
    • http://files.crisscrossroadbeeyard.com/uploads/1/3/1/8/131856352/zulojenipabegur.pdf
    • http://files.crystalimagesphotography.org/uploads/1/3/2/6/132696029/fafufalatulife_pisiluwol.pdf
    • http://files.buyers-club-solar.com/uploads/1/3/1/3/131398131/9206617.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/burger_king_gutscheine_august_september_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/lugamimuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0165/9043/files/english_arabic_mathematics_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/8013276812.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/rekomudikogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1782/files/30468758457.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8920/files/31322823955.pdf
    • https://cdn.shopify.com/s/files/1/0437/3689/1544/files/37441054663.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/23069828037.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/95798528172.pdf
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/sogefiwujufidezisiwonaduj.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_off00006fe4.bin
569f19884309a7c297f8788647b2b0644655e1a636cd739e96cac0d5b9f10a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE4 5592 bytes
font_01_sfnt_off000082de.bin
e9fd3da0e6bcea8626ad401af9b194a0fb3c39aabc1cdf8a593ffe00aeef98c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DE 11504 bytes

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