Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6c74152eaee5c5…

MALICIOUS

PDF

37.7 KB Created: 2020-08-22 01:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cb2ce529d8842abdd6c2438062c4e20 SHA-1: 21df1d3b02973416480039e25ff41222e57da7d4 SHA-256: cf6c74152eaee5c5e8469e2acbcb822ffeb5975d1b20e263324529582989c402
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'video player for pc exe' and a URL that matches the redirector. This suggests a social engineering lure to trick users into downloading potentially malicious content. The presence of numerous embedded links, many pointing to Shopify, indicates an attempt to obscure the malicious destination.

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.ru/pify?keyword=video+player+for+pc+exe
    • http://lurat.minimalistboutiqueskincare.com/uploads/1/3/1/6/131606255/e789c0958d2217e.pdf
    • http://fogirizax.mitchadvent.com/uploads/1/3/1/6/131637046/tajujisokifa_gojedomobeke.pdf
    • https://cdn.shopify.com/s/files/1/0434/0101/9548/files/9151865180.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8080/files/40698038677.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/73241117452.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/wokekigagisibixomo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1482/2808/files/rudimituwedul.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/63931030573.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/11861200720.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/70114915178.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/lb_photo_realism.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/88146155206.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/kowenupasovava.pdf
    • https://cdn.shopify.com/s/files/1/0433/8889/5386/files/the_arrival_of_the_birds_piano.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_off0000567a.bin
94795614ed3b3f84e5c2560454ac384f9cf5e45ff75fdadd9f6c31e0b013ea5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567A 5104 bytes
font_01_sfnt_off000067f7.bin
4d69b7620fef33d8b71dda39b6ad3edffbe8b8787c7008f3202aafd1cffb4cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F7 10004 bytes

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