Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcad38deb59170eb…

MALICIOUS

PDF

63.4 KB Created: 2020-08-11 06:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04c589f2043fc5e65727daf1d146154b SHA-1: e2b2909f3f97d5ffbb9f90e62109d13ab0d1eb39 SHA-256: dcad38deb59170ebec1b98cac97efe1d12085f7699fb1334f4b1c2e72e9d5661
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 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and references 'free pdf books', indicating a lure. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=free+pdf+books+on+life+after+death
    • http://files.coachgaryedwards.com/uploads/1/3/1/4/131438405/559238.pdf
    • http://files.champagneholidays.org/uploads/1/3/0/8/130814397/futovuf_pumuxexuxexi_fefazugemob_nezodalatumet.pdf
    • http://files.centrestagedancestudios.com/uploads/1/3/1/4/131452949/a4e7f0764.pdf
    • http://files.createlemonade.ca/uploads/1/3/1/4/131438477/latiluw-garizejen-befodanew.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/vocal_cord_dysfunction_breathing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/56923303280.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/82684882855.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/53805513470.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/81958494445.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/install_apache_web_server_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/34807052727.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/ronenanuxozulawugize.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/1557948354.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/73401185142.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_off0000ad60.bin
98ce2a9d9797df8cc7965f5be3a793b12b7a37b98107dfb8f9b3b2187a98edb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD60 5076 bytes
font_01_sfnt_off0000be8a.bin
3246eb3252654956dc5f70b7789a45813dcd5190bf163502b7ce5bc169f94370		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8A 10420 bytes
font_02_sfnt_off0000e1f3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 4324 bytes

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