Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9767974b8aa56c9…

MALICIOUS

PDF

43.1 KB Created: 2020-11-04 20:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f377bb9d6f013c9c64d0ccc89f00097 SHA-1: 1a8dcf5685640eb49e17c3411715ec63ea3b4187 SHA-256: b9767974b8aa56c9576c646cbd1edb949d1c5ee1058e5609635cd0a18829b1e5
162 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to link farms and redirector infrastructure, indicating a phishing or malicious redirection attempt. The document body contains a deceptive lure about a cancelled game, likely intended to trick users into clicking the malicious links. The presence of numerous external PDF links suggests an attempt to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/123?keyword=titans+game+cancelled
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/begaxu-pukevifiliwumu-koxakukume-sirenefede.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/d39da41031.pdf
    • https://zawiferodabubap.weebly.com/uploads/1/3/4/4/134447725/7015940.pdf
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/6870013.pdf
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f87024a08c95.pdf
    • https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/95a09e.pdf
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5f9090fed28cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4b565af7-d53d-41ac-a083-ae687bba858f/94554115052.pdf
    • https://uploads.strikinglycdn.com/files/f2d2f0bb-1fb6-4040-bb69-30e33ca61d91/digimon_apk_download.pdf
    • https://s3.amazonaws.com/zafaronivaj/do_local_winds_happen_over_long_distances.pdf
    • https://uploads.strikinglycdn.com/files/4331c010-676d-4d4d-b94d-e759a8c73c97/jisalixusanakuvituvojot.pdf
    • https://uploads.strikinglycdn.com/files/4259ef7f-c883-4715-bdd5-c0264da99344/out_out_robert_frost_analysis_essay.pdf
    • https://uploads.strikinglycdn.com/files/e2733e7c-b856-40d3-9f3d-d7e5f1fd30a8/30643707311.pdf
    • https://uploads.strikinglycdn.com/files/3c02e320-20ba-414a-bca4-eff700f98456/92728744105.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/mechanicsburg_middle_school_band.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_off0000681b.bin
34b99d663ae752d5806049c7824e826306e060147726ec415cab76f81da17026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681B 5112 bytes
font_01_sfnt_off00007972.bin
988c81b5d95f4e731d4fc1184618aef8dcd918466aa83f7365da34e6b76c2f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7972 11232 bytes

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