Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebd4feebcc50346…

MALICIOUS

PDF

49.5 KB Created: 2020-09-04 02:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3551ddce5d0573d3a8771b84fe0af5db SHA-1: f7fe1176bcc29c67f31a4660f46ac5dd8ca9a2ba SHA-256: 6ebd4feebcc5034632ccb4339ceb5d907ee8a11c7ff72b33503ce5f07dd07323
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised with a keyword suggesting a financial report. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.me/wix?keyword=credit+suisse+wealth+report+2013
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/54dfea_7c7fb948f32f4fc09daeccaa6c92c905.pdf
    • https://static.usrfiles.com/ugd/4c76bf_30b21cddb2d6473394f09c4040d53f95.pdf
    • https://static.usrfiles.com/ugd/d017d5_a1652846580e4ed6a5315e66394b190d.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab4fb75bd07401dbd7e7bf39f9660f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b65c760b31a648a095036790a0873184.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2fc3fdd1b7b45ecac6f7c150c6a00a4.pdf
    • https://static.usrfiles.com/ugd/6f58fb_73ca654ca09c47d6b2a9742934e68772.pdf
    • https://static.usrfiles.com/ugd/33ab24_32f900486d12435b9d9e11b402aab8c5.pdf
    • https://static.usrfiles.com/ugd/1849a1_224ae3f681f1462e995c3729f41e3d2a.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/natixujivurufukovekatore.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/partnership_fundamentals_class_12_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/deligujatudefip.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_off00008268.bin
e7ec706adc9d0a443b4e7a1b7be86076dbe7d07867474371d39026b3710c9355
pdf-font-stream PDF embedded font (sfnt) at offset 0x8268 5532 bytes
font_01_sfnt_off00009544.bin
66c905e9b5601f581e4266fc1cbb8b94ba9fb6b39bd011320ed394d3bcc53a86
pdf-font-stream PDF embedded font (sfnt) at offset 0x9544 10860 bytes