Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b10ab9ab6055b67…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 09:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05260a3b3aef9ffe4e6dace2155f54d8 SHA-1: 50f9e1479626522bd9932669c8020c9e5bcb3885 SHA-256: 4b10ab9ab6055b67819571f1376167ee7e206d2cc3759d793222779ccfbc416a
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, specifically ttraff.com, with a query parameter suggesting a lure for 'cleric spells 5e pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the redirection attempt. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm used 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.com/wix?keyword=cleric+spells+5e+pdf
    • https://static.usrfiles.com/ugd/8acad3_c0d3ad3f6e2c41a8852e68c2ef874a5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e0f500d713148e38461148786b0980f.pdf
    • https://static.usrfiles.com/ugd/b58d21_34b4533ba2ca48eb9146359cc6a876b0.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/mexorumibidek.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0535/files/splatter_brush_photoshop_cs6_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/updos_for_long_hair_for_formal_events.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/40361306038.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/ziveronalosur.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/janapada_naa_songs_kannada.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ca450560b54881aa546c7506a69fa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7833f64966f34f469fad80d53459a300.pdf
    • https://static.usrfiles.com/ugd/b8c837_a94da9403b274d20aff407ca5f7507fd.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_off000064ea.bin
80bf5e1b2a953675c38a352fba7b1e683f2dd97ab941e901758d52f348a57aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 4968 bytes
font_01_sfnt_off000075dd.bin
48578ef76c5f68b6a82b3f1a4eb8882be0c7b9c772cdb179513328d9a58dbd89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 9884 bytes

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