Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ec8bed9c6e9ccb…

MALICIOUS

PDF

39.2 KB Created: 2020-08-30 22:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e1c201eb1683078a2ae58f72091ea67 SHA-1: 36dc63620645f0fb57dd272963a580c294139747 SHA-256: 06ec8bed9c6e9ccb3002bf74b5fd7fd3f2096d4d8522917f7af96e799bca1e68
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, includes the URL 'https://ttraff.ru/wix?keyword=sql+joins+queries+with+examples+pdf', suggesting a lure to trick users into clicking on it. The 'PDF_SEO_LINK_FARM' heuristic indicates the presence of numerous external links, further supporting the malicious intent of redirecting users to potentially harmful content.

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=sql+joins+queries+with+examples+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0435/3950/files/wejixipifixupon.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/duwozowabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/laguk.pdf
    • https://static.usrfiles.com/ugd/a86d68_c2071a13c5b94467a7acdf76e3ca4190.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e721ad7b5454fb48fa1b5ac54405ad1.pdf
    • https://cdn.shopify.com/s/files/1/0438/4283/0496/files/orthographic_to_isometric_drawing_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/bibatubefufalumirunow.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/fotubedirezukakuriz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/57903188072.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/87822910341.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/23030486509.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_off00005961.bin
acb13b8f4de095d0a25fc452882847c95a56c351605984f3e36d230d3274cd17
pdf-font-stream PDF embedded font (sfnt) at offset 0x5961 5744 bytes
font_01_sfnt_off00006cd5.bin
97c138390d55027128cd3be255b75505580dd50244b0c639a9226eea398f7eff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD5 10416 bytes