Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd9945a710eb7ea…

MALICIOUS

PDF

48.1 KB Created: 2020-08-31 19:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9893fea2d92f19772c2bb3941e96b9d0 SHA-1: e029e0f504ac8cec11c0803637719589158bcdda SHA-256: 5dd9945a710eb7ea13e4e7457aeeaca53991f65f27b84451c6a97ab1027710dd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for software downloads, including the URL https://ttraff.ru/wix?keyword=teatv+for+pc+latest+version. This indicates an attempt to direct users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

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.ru/wix?keyword=teatv+for+pc+latest+version
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_685805a2e6f94bc3a55f425cf588e642.pdf
    • https://static.usrfiles.com/ugd/b7ed05_1450ef59d45e4202879febb2047744c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1184f9f3fe86435aa291defcad351a0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d10816cdf84f4571815ab62f637a5402.pdf
    • https://static.usrfiles.com/ugd/5926b4_d49949434af24302a33d876887b8fe19.pdf
    • https://static.usrfiles.com/ugd/87d215_47786cd9bdf94206a6f669e28b843956.pdf
    • https://static.usrfiles.com/ugd/77eba6_341c88dcfb9b4a43815e89ac7d4ba206.pdf
    • https://static.usrfiles.com/ugd/b8c837_1090561acb51407e9a75fb0299b9f7d8.pdf
    • https://static.usrfiles.com/ugd/83e24f_33bc7986a7ac48ebb94558ea8b2365b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_12c70df8f6874c928cbe2bf06766e928.pdf
    • https://static.usrfiles.com/ugd/3ce946_bd03ea9e4909482a8cf724a441f6694d.pdf
    • https://static.usrfiles.com/ugd/b8c837_92074b9a757c491eba549f6adecaa1e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a153936927df48dbbdf7ad9dd26bfb88.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c71.bin
8051340a6d85f07900121df0d781b5f5b07658ac392d77124fabbfd12253ea5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C71 4808 bytes
font_01_sfnt_off00006cdb.bin
db9ec278e42201696253efa183925229c57a4cc80b2ad08a26d2c7dc9fe9656c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDB 10296 bytes
font_02_sfnt_off0000905d.bin
3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x905D 16164 bytes
font_03_sfnt_off0000a556.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA556 4324 bytes

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