Malicious PDF — malware analysis report

Static analysis result for SHA-256 b534af5120234183…

MALICIOUS

PDF

37.6 KB Created: 2020-08-30 13:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fb9e0db8bc4f1ba89fb153568fc18fc SHA-1: d21d7806296bb8bf36f471ff2e4f3dc0115994ce SHA-256: b534af5120234183b1deee80b552987a3cb00283f7e5dad2a2b8bd08a75b2cee
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com). The document body, though heavily obfuscated, contains text referencing 'Baldur's Gate Enhanced Edition manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=baldur%2527+s+gate+enhanced+edition+manual
    • https://static.usrfiles.com/ugd/9e53d4_50c0a8e3f32343719cb56af93e2307ba.pdf
    • https://static.usrfiles.com/ugd/3826db_dace7503c8874fd3832a8307e708516a.pdf
    • https://static.usrfiles.com/ugd/b8c837_29c6e5411e934a018cb052603a8311d5.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/14047143900.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/62836016207.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/26983712497.pdf
    • https://static.usrfiles.com/ugd/2486b5_1ba684508f1f4a35bc53baa6c16dd618.pdf
    • https://static.usrfiles.com/ugd/cb4a18_551bd708ef24463881488d131c93b40d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e7d1d0853c747a1ad25edcac3ef4490.pdf
    • https://static.usrfiles.com/ugd/8c0e65_ae7ecc935aa249fabc1a0c4635c725af.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/sawizazebanavebikabidifox.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/solving_factorable_quadratic_equations_worksheet_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1609/2828/files/romifulixaned.pdf
    • https://cdn.shopify.com/s/files/1/0462/8722/4993/files/8000711931.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_off0000535d.bin
49d2011538cc923c7f8fcf3ed977044cd6bd3e23e8b14461a37a0d855227946e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535D 5436 bytes
font_01_sfnt_off000065a1.bin
c1a6199b860bec32f859616945bf6e508aeeb2844acdd28aea0acba31f255c42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A1 10932 bytes

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