Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d03d4d131632586…

MALICIOUS

PDF

46.2 KB Created: 2020-08-30 05:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f810edf928abdb8edbd028b3944ff2 SHA-1: 03418703419acc9b452225325c6d5d298942d7ab SHA-256: 6d03d4d131632586d27a11b0bcf094f05208a90d0d3c371402650a2ba0e875c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=paul+rotter+strategy', which is also listed as a critical heuristic finding. The presence of numerous other PDF links suggests a link farm or a tactic to obscure the primary malicious destination.

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.cc/wix?keyword=paul+rotter+strategy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c051c2ad37c547e49deeae9af09b1a8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f451dc816fca4411af055875a0af53e9.pdf
    • https://static.usrfiles.com/ugd/badafb_4fff0bdc035a4c488d0cb3ad9413b24e.pdf
    • https://static.usrfiles.com/ugd/19103d_1538abb995c049209a05df969564c787.pdf
    • https://static.usrfiles.com/ugd/b8c837_77151b43802844539594be89dd31bea9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bb2aa7339834f3a8358bd9568f5b3e9.pdf
    • https://static.usrfiles.com/ugd/4c1554_8cc03506136c43439fc02bb575e314aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_370d3142b2dd427b91091a4ecdfb54ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_6be1c08ab6f04fba8c62b1b55f411067.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a0b90329eae4c639336662e90f90bb4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0c0193e9c7246ddb5585ce6045ff1ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_258c5ebfe2f44e61ae08dfc4b160009d.pdf
    • https://static.usrfiles.com/ugd/238140_e005cfadc51940919933fc5815051385.pdf
    • https://static.usrfiles.com/ugd/724bd4_1593af5690a543e89bfcb0603e8c6ec0.pdf
    • https://static.usrfiles.com/ugd/6a22cb_781950bf99114923a37f9ac5fdd690ed.pdf
    • https://static.usrfiles.com/ugd/88a84f_551e2c0f405745778e212774ec1d8839.pdf
    • https://static.usrfiles.com/ugd/374ce0_5c39e474e2a143059aea498bdd897d0b.pdf
    • https://static.usrfiles.com/ugd/b98abb_c43384b3ad6d4aa484e7f38ee51b656c.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076f8.bin
6085ad477f477f4da172ab175fc5ae8ccf304d4fa7a6d0c0f78a2a39171a418c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F8 4956 bytes
font_01_sfnt_off000087e9.bin
bde5eba13f47e84326e9a360469d48ef420b1fd8a8b7706e85a0f66c11f6359b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E9 10524 bytes

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