Malicious PDF — malware analysis report

Static analysis result for SHA-256 c553d2ed21f746e3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-29 15:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa0d8ab5efe99cc580cca93d670c4316 SHA-1: bcedfde4f0b7658a0ec00ce07955f81cbe6de02f SHA-256: c553d2ed21f746e3686a839fa856f4b2e555478d46b45e4a6eb40eebab395b7a
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.cc/wix?keyword=mad+world+version+originale'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are benign but likely serve to obscure the malicious one. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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/wix?keyword=mad+world+version+originale
    • https://static.usrfiles.com/ugd/b8c837_8d9ffaeceb504c518a6638ab40a23277.pdf
    • https://static.usrfiles.com/ugd/b8c837_89b0327fe74e416990a6dc0013402122.pdf
    • https://static.usrfiles.com/ugd/b8c837_c30b0676b3fe480a814824f992a622ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_052f2125847e49058c83956fdea2c9cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d228cf0fb074174a5a836a7df557179.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/28938065461.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/32543419813.pdf
    • https://cdn.shopify.com/s/files/1/0429/6094/5305/files/8172071432.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/66035229303.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/45664733862.pdf
    • https://cdn.shopify.com/s/files/1/0431/6296/0023/files/71244608430.pdf
    • https://cdn.shopify.com/s/files/1/0450/2922/8702/files/some_any_somebody_anybody_something_anything.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/kozesodexor.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/gear_backlash_standard.pdf
    • https://cdn.shopify.com/s/files/1/0433/0189/6347/files/xomuletupozosepinenelo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/automotive_maintenance_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0465/3518/0447/files/bukajikewopisogi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/60772537754.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_off00006ae5.bin
f21e7c66bf764ab5836f0f1c81ce822286f7df00b06f0b03ca3d0ca7d5ab320f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE5 5152 bytes
font_01_sfnt_off00007c96.bin
8dad0318846576f2cc7f7fdfa367045fd73012eab8d89bcd8e4b6144dba5e346
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C96 10284 bytes