Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5413784eef95605…

MALICIOUS

PDF

33.9 KB Created: 2020-08-06 10:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d9ea55240b357132619399651cbb70a SHA-1: a379c70a3ff21106e3aa7b5143d6d14b3a4fd595 SHA-256: f5413784eef9560571d1c1587c0bd3f265f933a07bb5757ecd4bbdbb08f1ca2d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to a URL designed to lure users with a fake book download. The document body, though partially corrupted, contains text related to 'neurokinetic therapy book pdf free download' and the malicious URL itself. The presence of numerous other links to Shopify, some confirmed benign and others unknown, suggests a link farm tactic 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.cc/pify?keyword=neurokinetic+therapy+book+pdf+free+download
    • http://jefivax.youngjoopark.net/uploads/1/3/1/4/131453109/7b20bc3d.pdf
    • http://files.lighthouse-gardens.com/uploads/1/3/1/3/131397996/9236342.pdf
    • http://files.jkenwellstewart.com/uploads/1/3/1/6/131607131/c416ad4.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/hematopoiese_extramedular.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2974/files/medulegujodanebavula.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/bejamixuxela.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/19983200505.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/78000296436.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3183641906.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0429/7778/8057/files/zoover_fetty_wap.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/raliduxakomitux.pdf
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/93080496462.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_off0000459c.bin
2a862c72ef5938d33af40ab93d42f21cd4ea1091daa817a2323e4c3c9a38c8c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x459C 5432 bytes
font_01_sfnt_off0000582f.bin
8dacb472398374c1d473e6718e5db744e9adc68fb1ffe29ce0a14762451f82f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582F 9788 bytes

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