Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d973b9456642304…

MALICIOUS

PDF

47.6 KB Created: 2020-08-20 10:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0504eefdc36662344485acea6cc270c3 SHA-1: fccf40b31f0420e0d4712e4530ed905ac785f536 SHA-256: 9d973b9456642304c6f008f0de3335f7ae5f8603c280d17e88ce5d8ac94db92a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=excel+sheet+filter+shortcuts'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful websites.

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.com/pify?keyword=excel+sheet+filter+shortcuts
    • http://files.gaborbacsi.com/uploads/1/3/0/7/130739601/xofikitow.pdf
    • http://mogitun.gray4gs.com/uploads/1/3/0/9/130969858/588e644bd2f.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/19540402958.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/laws_of_algebra_of_sets_examples.pdf
    • https://cdn.shopify.com/s/files/1/0439/2887/9272/files/nowujufogaxeju.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/57052010193.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/92657437435.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/85784122586.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/xubupofupidavodenurefafo.pdf
    • https://cdn.shopify.com/s/files/1/0451/7802/8183/files/project_scope_statement_template_pmbok.pdf
    • https://cdn.shopify.com/s/files/1/0430/1897/7443/files/32015632225.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/gubirufi.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_off00007e22.bin
d51a06b766225781ef538c051b0dc405575b001761db474eda81db23b38cc0cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E22 4784 bytes
font_01_sfnt_off00008e5a.bin
815df74ec9ff917ff73dd5c94ec7a0a1d16283bf2946168965942bea6ab9efa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5A 10352 bytes

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