Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c8cddd67a17f96…

MALICIOUS

PDF

44.3 KB Created: 2020-08-19 09:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b09b7bbef2e4b036ab4a7c66d8f5c422 SHA-1: f58fcc9c1f98599436c79aedcfa0c2f5f14318bf SHA-256: 23c8cddd67a17f9627d7e82b425cb26ceb14a2223d7197001f02a9cb13c579e6
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=chute+chute+song', is identified as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=chute+chute+song
    • http://files.brightonbeachsurfshop.com/uploads/1/3/2/3/132303035/zatizisodubanojal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1976/2840/files/21619402503.pdf
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/cs_go_crosshair_commands.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/28203086358.pdf
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/gabasuxarupu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/27828312669.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/89182959650.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/semuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/verosatonanesoxosevexoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/lediwajibozuw.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_off0000591f.bin
f2bd6a3c48f52fa2213d9a6aa9ae82e6b47d841ab8340fc1c94123fc40352cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 4628 bytes
font_01_sfnt_off000068e3.bin
ac3d34a79e607d5717f2c49bcdaea71be3552a3920a74cf25fec7eb9b1c221ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E3 15136 bytes
font_02_sfnt_off00009801.bin
e455f296beb6fd8302703b20393308b4775e5e17241f8c4618cf0a29e4ad5437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9801 3256 bytes

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