Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dae07e087a23d5f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-25 00:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 873867ba3e402b4181b028bc054fd0a6 SHA-1: 17b2b93e8a55eb7a6fb34f69e7529fd578798c24 SHA-256: 4dae07e087a23d5f17a2c84c54f5f70638e2d5f0080a5fd433987e3ae43c2f27
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=barbie+fairytopia+movie'. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or phish users. The presence of multiple PDF links points towards a technique used to artificially inflate search engine rankings or distribute malware through seemingly benign documents.

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=barbie+fairytopia+movie
    • http://files.centergroundcoffeeshop.com/uploads/1/3/0/7/130775350/bepukuwenuxosusabiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/bach_air_on_g_string_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/powopisizibojopabubefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/wetoxuvoraxotemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zitadeduwifugegumav.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/89880509022.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/zaziwifa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/4132001566.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/wepejub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0745/files/4646916095.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/13359654131.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_off00006703.bin
dc751685b27e8857f008bbc0ac294e86473172140590e3c98af599ab12d1e9ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6703 5188 bytes
font_01_sfnt_off000078a5.bin
149ff47c5223b48af4e38639292644707383441068a2ac7654d7e461b2176a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A5 10452 bytes

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