Malicious PDF — malware analysis report

Static analysis result for SHA-256 6146564edc171664…

MALICIOUS

PDF

57.7 KB Created: 2020-08-29 05:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9e6da797804c19d941da897ae8668d3 SHA-1: e3717ef8dff931c7f58914ca9310d60bc442efca SHA-256: 6146564edc1716648a3055c86bff65c66e4b52161a984cfb2b11184c74db266f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'Toothsome chocolate emporium menu PDF'. The presence of numerous external PDF links, many pointing to Shopify, suggests an attempt to create a link farm or distribute further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=toothsome+chocolate+emporium+menu+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2707/0117/files/5159480307.pdf
    • https://cdn.shopify.com/s/files/1/0437/5317/7237/files/kubota_mower_deck_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/zosenosoxiganidibetema.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84712881745.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfc2266b12354d6bb593e96dbaea740c.pdf
    • https://static.usrfiles.com/ugd/b8c837_da9f0a3e60d444579fb668a304eac41a.pdf
    • https://static.usrfiles.com/ugd/b8c837_dab5dad5c154444baac3490c4848d38d.pdf
    • https://static.usrfiles.com/ugd/b8c837_108330e012aa4023a29d35106c08d965.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f0e8922dfd942efa2013882555d4d27.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdf
    • https://cdn.shopify.com/s/files/1/0458/1448/1062/files/machine__tricoter_lectronique.pdf
    • https://static.usrfiles.com/ugd/b8c837_115ae9c193484922906247c9ee7ae7dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_13069e5ea59e426e91a94cabcaab5760.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_off00009750.bin
6204bb4e8953e72d5300c8dd8252f59dca9c0cd19012cd4acb72030216da0bd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9750 5344 bytes
font_01_sfnt_off0000a953.bin
49499bb2e421f42ca2ae590bba33f9595577f8f1243bcfbffe00731747a1f804
pdf-font-stream PDF embedded font (sfnt) at offset 0xA953 16012 bytes