Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9c5b3d244da61c…

MALICIOUS

PDF

36.8 KB Created: 2020-08-28 06:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63eccd8d189e5ec35841918b8b714266 SHA-1: 245271321137cca3c11b5479db6827e9b8057413 SHA-256: bb9c5b3d244da61cbdb88f1a2abe4db847d6350312fb286270d47208407b1ce5
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=analytic+geometry+pdf+by+love+and+rainville', suggesting a lure to download a PDF. The presence of numerous links, including to Shopify domains, indicates a link farm strategy to obscure the malicious destination. The file is identified as a PDF and its authoring application is wkhtmltopdf, which can be used to generate PDFs from web content.

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=analytic+geometry+pdf+by+love+and+rainville
    • http://kenes.piercemadison.com/uploads/1/3/0/9/130969592/77492.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/9663131155.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/historicidad_y_temporalidad_de_los_conceptos_sociologicos.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/kosiromelalajo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/discord_block_quote.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2643/files/43847186230.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/chaconne_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/jatimusemusizifag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/60670383720.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043c2.bin
0b81c173bab310b821396666867d3986b8b9040375dcaee31a0090c1532f92dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43C2 5376 bytes
font_01_sfnt_off000055f6.bin
314aabf777ed85c2b95b46416ebdb1060b2e5a73dd605d399078f22024eb9816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F6 10148 bytes
font_02_sfnt_off000078b4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B4 4324 bytes

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