Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43a9cc935a8a039…

MALICIOUS

PDF

40.2 KB Created: 2020-08-19 01:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62fc160ed042820cb2fa992b80edb359 SHA-1: cb53bc35a2eebe9074b21406f75b52e719c0a4ad SHA-256: a43a9cc935a8a039b178b1566dc00625599273e934fe29ee525d82f5b350758c
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 to other PDF documents, a technique often used for SEO poisoning or to obscure malicious redirects. One of these links, 'https://ttraff.ru/pify?keyword=rune+factory+4+smithing+guide', is flagged as a malicious redirector. The document body itself contains metadata related to 'wkhtmltopdf' and a reference to the same malicious URL, further indicating its purpose.

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=rune+factory+4+smithing+guide
    • http://wogukaraj.brokenknucklekustoms.com/uploads/1/3/1/0/131069759/8072079.pdf
    • http://files.southeasternclubcl.com/uploads/1/3/1/4/131438776/d43b5f149f85b52.pdf
    • http://files.richardsonlegalpllc.com/uploads/1/3/1/3/131384127/6106404.pdf
    • http://files.rooznote.com/uploads/1/3/0/7/130776166/vugorirunak-rafabe.pdf
    • http://files.aerospacecompetition.com/uploads/1/3/1/4/131437969/toxepabarogafatunem.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/50885656923.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/47723472857.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/alesis_sample_pad_4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/tumuwoxivoj.pdf
    • https://cdn.shopify.com/s/files/1/0451/2271/5801/files/antibiotic_resistance_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/30536664257.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5479/files/jutipatidomawef.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5656/files/46161170722.pdf
    • https://cdn.shopify.com/s/files/1/0447/1321/4108/files/breathing_gym.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/ladun.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_off00005e4e.bin
00f2d687742ddecb93407baace8020b63624e2cb3d85db368cd67a7beeaec051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4E 5600 bytes
font_01_sfnt_off0000714a.bin
139cac395eb7a51ad29e9a39f0a8147a55c7ac406076b02e5d4afa8b446fd871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 10272 bytes

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