Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af30659e85e23ee…

MALICIOUS

PDF

63.1 KB Created: 2020-07-28 14:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e129f1e5af61ddf8bd935244039fd0e5 SHA-1: 07dd88c508924bee8b94f65d00213065f0be6b59 SHA-256: 5af30659e85e23ee332ab2d508353265bd863f3d9dd9ae862c15162211272446
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to external PDF files, suggesting a link farm for SEO manipulation or to distribute further malicious content. One prominent link directs to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

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=cement+production+technology+pdf
    • http://files.chamonixpatinage.com/uploads/1/3/1/3/131380177/7304951.pdf
    • http://files.vandalsgames.com/uploads/1/3/0/8/130874683/pipowuxezujijume.pdf
    • http://files.jessicamixon.com/uploads/1/3/0/7/130775033/5fc580170ec.pdf
    • http://files.everlongcreative.com/uploads/1/3/0/7/130775163/7540740.pdf
    • http://files.emilyshapiroconsulting.com/uploads/1/3/1/4/131454190/beruxewiseboj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/xuxokebisezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdf
    • https://cdn.shopify.com/s/files/1/0440/6866/7542/files/ripujizevasemelug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/nibot.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/74330703489.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/dinezajujenujajuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/medonuwevijexopokarowiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/25789824688.pdf
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/35262372017.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/tebavasira.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/20350820136.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/medebevobumal.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_off0000babe.bin
9c276d4e9096c86a40cebc8e776b6b6a0dddc957e4eef9c8449525dfed1ef178		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBABE 5188 bytes
font_01_sfnt_off0000cc43.bin
b0d6b9d3cbedd08eb2848caebd1605d92ff0e8109fe3d0e2a9eb40dcc07929b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 10108 bytes

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