Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e7781f807f7d75…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 11:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d61694df011772b5e72931a627ade5b SHA-1: cc915865f3f50013bafe34c9d6a7290c562c4cc9 SHA-256: 84e7781f807f7d75b22b96e48aa435178a185ec76a7a1def0c31923bbf553f59
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. It also fires for PDF_SEO_LINK_FARM, suggesting it's part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The primary malicious URL is ttraff.ru, which is used to redirect to a large number of other PDF files hosted on cdn.shopify.com and other domains.

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=kenya+tourism+board+report
    • http://mupugim.busybirdhandyman.com/uploads/1/3/1/0/131070374/karelopajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/xuwopumorasarapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/best_markup_app_ipad_pro.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/personal_assets_and_liabilities_statement_sbi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/26313778819.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/92073767922.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/fewipafodebizep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/motaravefibiwolizorim.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/wexorizawaguzom.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/71550617019.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/64321879134.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/32084018883.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/tixajuruna.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_off000063fb.bin
97207abdddcd134f11ad988d5925f25864203d316421829e5d5547ba9f68f19e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FB 5284 bytes
font_01_sfnt_off000075e0.bin
7afc2326b0426c6ed4ffbb0a1cbab2b597835aa8ea719eb0aa762ab2f73c6d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E0 10764 bytes

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