Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf727dfc0c1248c0…

MALICIOUS

PDF

40.4 KB Created: 2020-08-19 14:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1510c1e2f2fd3cebcf7a7dd6588b02c SHA-1: b2b2bde3d89317e92030181f4e1cc02339e08fda SHA-256: cf727dfc0c1248c0e15de068d48321bb864713884da7765748f1c2d23bb1ea4b
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.com/pify?keyword=interim+progress+report+meaning'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being to a Shopify domain. The document body, though heavily obfuscated, contains text related to 'Interim progress report meaning' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious activity. 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.com/pify?keyword=interim+progress+report+meaning
    • http://files.awestcoastcelebrant.com/uploads/1/3/2/6/132681698/kunijutibobabox.pdf
    • https://cdn.shopify.com/s/files/1/0432/0942/5056/files/53530261180.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/robotics_and_automation.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/4894652573.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/rivibubebamikoxetibidug.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/rimexumotatonikowamidi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5895/files/janatha_garage_audio_song_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/curso_de_ingles_en_completo_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/kepesiweximobudiwidide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/4294348260.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/bjt_differential_amplifier.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_off00006292.bin
0bb0cb0c309fc25f3fb4e6f3d0e5c381ac20397f3083873cc0849e2bb2ea39d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6292 5044 bytes
font_01_sfnt_off000073a3.bin
2615a5405a549e4142e812f83e526a0d19d1daa63b257314da4e3139f1a91290		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A3 9768 bytes

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