Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a226226563d4fa…

MALICIOUS

PDF

39.4 KB Created: 2020-08-06 02:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8755f11c05d1b8c2a2bf7e3b27226653 SHA-1: 249d704dcb419f22ed108ff25383fcd6258fb490 SHA-256: 27a226226563d4fab55776bb696333cc1dfd5b06aad96d8e54bced6691259f6e
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a high density of embedded links, a technique often used for SEO manipulation or to redirect users to malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=line+number+pdf+file'. Another heuristic flagged a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0434/5783/9254/files/diroveborasiwakivijigeda.pdf' being the first identified. No scripts were extracted, limiting the analysis of direct payload execution.

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=line+number+pdf+file
    • http://files.turfcroquet.com/uploads/1/3/1/4/131437222/759526.pdf
    • http://zenijura.good-neighbors.org/uploads/1/3/0/7/130739415/xozuvukifiguloto.pdf
    • http://maroja.glitznglamedinburgh.co.uk/uploads/1/3/0/9/130969656/67579bc.pdf
    • http://files.deckermusicstudio.com/uploads/1/3/1/3/131398598/kamowojegifipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/diroveborasiwakivijigeda.pdf
    • https://cdn.shopify.com/s/files/1/0439/6836/4702/files/zizutusikapodeminifituwiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/john_deere_1070.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/97236177950.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/budebajuwutimekudik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/69576521549.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/zuvazurawixizerejili.pdf
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/51570031850.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/92046427263.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/66202979665.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/xelulegujewixulivad.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_off00005bcd.bin
438cf944bcf8ed4090924f37e533306bdb7d47bf64428290069033a0bc2ffd92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCD 4880 bytes
font_01_sfnt_off00006c48.bin
f6346dbf25646ab714edabcd2d259464da5db3c48403ffc601a5eeadd34a2a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C48 10748 bytes

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