Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecdd95889e874d5…

MALICIOUS

PDF

50.3 KB Created: 2020-08-20 07:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f79390b68e83add147ef3cc533d229f7 SHA-1: 8654be6b32f245f59acdf02a909392dd76985b42 SHA-256: 5ecdd95889e874d5f8b4d4bf43521eac78a9c5eb27ca425a5abc2a5747a2a2b8
154 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified as 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection 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.com/pify?keyword=brothers+day+songs+free
    • http://tudur.davidfalkdesign.com/uploads/1/3/2/6/132681482/zuponusijur.pdf
    • http://files.theruemorguetattoogallery.com/uploads/1/3/1/4/131454355/21400d54b288ce6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/hampton_bay_antigua_ceiling_fan.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/accountant_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/flash_update_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0434/2113/9096/files/jovumidij.pdf
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/91512839665.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/risunitufolop.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/tanomimax.pdf
    • https://cdn.shopify.com/s/files/1/0432/4314/3330/files/spreadsheet_compare_excel_2010.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_off00007e22.bin
7c1daaae57e96834c77a7a05df0be366f50a8507cd8328c6bace14bf349f8cb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E22 5288 bytes
font_01_sfnt_off00009026.bin
2d0c002bc8dcfc0b8147da06bf8f285c7f81e8fbef99eb026f7fb7774371f658
pdf-font-stream PDF embedded font (sfnt) at offset 0x9026 14408 bytes