Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d821a1ae09e815…

MALICIOUS

PDF

47.3 KB Created: 2020-08-19 21:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a530ec90fb9fa3439b4db449d281a2bc SHA-1: 15b7cf4a5b1d700fa752541d01c1b59780a810a9 SHA-256: e6d821a1ae09e815e257208ac7b9b40da99e4f78c344e84bd99596f547a2289f
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, suggesting a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.cc/pify?keyword=estudio+de+caso+descriptivo+pdf' is a primary indicator of malicious intent, likely serving as a redirector to a phishing or malware site. The document body, though heavily obfuscated, contains references to the same URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=estudio+de+caso+descriptivo+pdf
    • http://merej.shsinternational.net/uploads/1/3/2/6/132681556/veguratafigox_tewumagizur.pdf
    • http://linijo.blackdiamondtri.com/uploads/1/3/2/8/132814930/pupewin.pdf
    • https://cdn.shopify.com/s/files/1/0436/0214/9539/files/minecraft_clash_of_clans_mods.pdf
    • https://cdn.shopify.com/s/files/1/0431/4172/6370/files/hidrocarburos_aromaticos_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/abacus_big_friends_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/homemade_wind_turbine_car_alternator.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/15734767803.pdf
    • https://cdn.shopify.com/s/files/1/0444/3917/5335/files/kewuvixuwasitoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/norux.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/dark_souls_2_mad_warrior.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/automobile_engineering_book_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/55873565557.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_off000079e4.bin
306c8d5f045559b463307c77145f4204d2ad0406fa8cb1e1cfe76fb7a6409343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 5136 bytes
font_01_sfnt_off00008b72.bin
6c2bfdf1550a2255670dabe76042002a3901d9c874beb4fa85020ebf5ac39f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 11036 bytes

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