Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d00be1a8bae9b52…

MALICIOUS

PDF

103.4 KB Created: 2020-09-02 18:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33f2a7d2c9d522fbd7f0d1e914cb628 SHA-1: 065d65bd5bfb85731cd3bce82de84690ecc5a6fb SHA-256: 6d00be1a8bae9b52b09f6c72ee5a96a4c354292b27b8d3d56d6fdf4db0762b38
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 the URL https://ttraff.ru/wix. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, including one hosted on Shopify. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=citrix+netscaler+adc+datasheet, suggesting a lure to disguise malicious activity.

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=citrix+netscaler+adc+datasheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/jasopedatoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/nowubogaviwepurifige.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/27183062963.pdf
    • https://cdn.shopify.com/s/files/1/0436/6997/9289/files/raveg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/10396166392.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3718/files/byomkesh_bakshi_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/25272328115.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/certificate_of_conformity_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3271/files/my_talking_tom_2_9apps.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/ruruj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/38311078703.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/o_que__capitalismo_primeiros_passos.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/mariam_khan_reporting_live_written_episode.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/32380490668.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_off00014c2f.bin
5b375cb33ec87d5356a2c9ef14efe8242140155fef2e263306e1ad73d0e61299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2F 5000 bytes
font_01_sfnt_off00015d22.bin
8f70e857903cae3a4110fa36d0dcb997541e9697923ad0d326484723de5dea3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D22 16508 bytes

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