Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffeaa6e6563be19c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 16:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 613755b4d19fce04758055a95cbac305 SHA-1: 3cc262bbdde2ec72037fdb7661419ea9032e1e83 SHA-256: ffeaa6e6563be19cb04e6ad5c2d710a6f208438f75e0c1a00c5013b290dcb183
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, https://ttraff.ru/pify?keyword=definition+of+cloud+computing+pdf, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document. The presence of numerous SEO-optimized PDF links indicates a link farm strategy to improve search engine ranking for malicious 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=definition+of+cloud+computing+pdf
    • http://files.apwindowsuk.co.uk/uploads/1/3/1/4/131453695/xusoso.pdf
    • http://files.visiblechurchgb.com/uploads/1/3/0/7/130775434/rovevijegijavuw_remonun_nupozi_pixef.pdf
    • http://files.drgigisrmuf.org/uploads/1/3/1/8/131858916/tetajop_boxiborefevoxo.pdf
    • http://files.lrhelpinghand.com/uploads/1/3/1/3/131380440/xopexuzirofib.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/beverage_production.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/44559886240.pdf
    • https://cdn.shopify.com/s/files/1/0434/6046/0701/files/85148197518.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/61256836049.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/90103767219.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/welixefuxeju.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/bekosevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/bubasopumadoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/pujopoxibakatojidireje.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/ketovil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6058/4870/files/veigar_aram_build.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_off0000651c.bin
4574862af8a1bf7442868bc811735defb16cebd9cd14efea0c665cb4ad94b341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 4988 bytes
font_01_sfnt_off0000760d.bin
63a8be42e8b57ff8d313f8d5719952e363dd647f1c9b3e158066ea18141abc55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760D 10728 bytes

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