Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8f7dd81bc7a8b8…

MALICIOUS

PDF

53.3 KB Created: 2020-08-06 10:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7803f8b97b604da523c9e1ba3a83efac SHA-1: c59dff07a9d8a4827a7beabde298c498aa488aab SHA-256: de8f7dd81bc7a8b8f2c853bfcedf39abbcf676b87c40529fba0a5cb4b89eb2c0
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 links, with a critical heuristic firing indicating a link farm and a malicious redirector. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content. The document body itself is largely unreadable binary data, but the presence of the malicious redirector and the link farm strongly suggest an attempt to lure users to harmful sites.

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=immanuel+kant+was+ist+aufkl%25C3%25A4rung+pdf
    • http://files.back2natureorganics.com/uploads/1/3/1/3/131398526/gevekivasozopifudu.pdf
    • http://files.businessgradeva.com/uploads/1/3/1/8/131871852/vimavonepovu-vofogufawos-wajafalu-zasetisosutek.pdf
    • http://files.heartsoultours.com/uploads/1/3/1/6/131606688/durigenuk_linowutavufep_xofidupu.pdf
    • http://files.emilymariephotographie.com/uploads/1/3/0/8/130813042/284064.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/nubujedugovoxam.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/sulexeribepixikij.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/xejuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/8955/8680/files/fuzufarodadupaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3501/6863/files/16975449232.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/eberron_campaign_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/68934520880.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/4592691461.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/25845122902.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/72137975632.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/52118842147.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_off00008eed.bin
b0e7614e0d9fe8b3083afe95685b1e7f4ea2e53841d13a611d7fc14621fbd477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EED 5692 bytes
font_01_sfnt_off0000a1b5.bin
583fcab736ee165359fe680b0a004149d010792432e28882146e970f2724823d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B5 11108 bytes

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