Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1dc19c0a9542829…

MALICIOUS

PDF

42.4 KB Created: 2020-08-28 15:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 032cdb0590ebbf5b3c80f2670d7bd853 SHA-1: 221feda5198d466ba4e351e17e5acd4bfc496fc6 SHA-256: e1dc19c0a954282919dcf23e7f5e95e12eb8cb4dce897605beb2513d58d2ff97
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=letras+del+abecedario+para+colorear+e+imprimir'. This URL is embedded within the document body, disguised as content related to coloring pages. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=letras+del+abecedario+para+colorear+e+imprimir
    • http://files.olmlancers.com/uploads/1/3/1/3/131381679/5c4eae.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/dupejonojix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/26793986731.pdf
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/vajebizexafabuxokafesupan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/commando_2_movie_full_hd_pagalworld._com.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/6032444752.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/bibokorudavukux.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/rhizobium_culture.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/vivakavenuxiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/budirizuxasi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058be.bin
8c00dab3296a071a43314b7c2421f0e8cc95e3f30d389a5ef47ddddf2ebe311f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58BE 4984 bytes
font_01_sfnt_off0000699f.bin
2f277c9f5ebf06ce9b7d1104285f0895b18dcdf6d4a39f272f19982d7717df44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699F 10824 bytes
font_02_sfnt_off00008cf8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF8 4324 bytes

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