Malicious PDF — malware analysis report

Static analysis result for SHA-256 d408115f0637d08b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 13:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7d1a7c1f13beb4c20ee099e985b0168 SHA-1: 09e343b6bc7e3bbbee1c44e930f9d8d70e3eaead SHA-256: d408115f0637d08b876e950b4b40dbe6528f14578de91b8a6201894a86b6b4cf
154 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'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same malicious URL and references to 'Ranger builds divinity 2', likely a lure. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ranger+builds+divinity+2
    • https://static.usrfiles.com/ugd/b8c837_1de3566b0fd0421b93de172b59c58feb.pdf
    • https://static.usrfiles.com/ugd/a86d68_ea59a0303cd347cea5d469e582488e1c.pdf
    • https://static.usrfiles.com/ugd/10e3af_d5675a60a65349b5be2b18a022998c64.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/forcepoint_ngfw_administrator_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7691/0242/files/fosozibudewodaxisomojo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/persona_3_cheats_pcsx2.pdf
    • https://cdn.shopify.com/s/files/1/0437/8073/5138/files/manual_caldera_baxi_mainfour.pdf
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/48337691412.pdf
    • https://static.usrfiles.com/ugd/b7082a_50b113c2091043529978fe2674b89cde.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a3ad819ca7040918230151a692985cc.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_off00005ec3.bin
a5d660669ce68372c5e91c598e1309ad412687a681b4c4d16f3367fc20274e46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC3 5436 bytes
font_01_sfnt_off00007154.bin
778385194c05ed240ee10622055f5eb7e95a8809b2ee0b9bc92252f6da152db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7154 10128 bytes

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