Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaff1c827bd54d8…

MALICIOUS

PDF

64.6 KB Created: 2021-01-02 10:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 744560673d849ced5f915118ca2a218e SHA-1: 3f483bb058f1fe7ab56b905198f3d7ed76d9d878 SHA-256: 4aaff1c827bd54d86aff00a1128f517fdf71035301357412a1848952ec962de8
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and part of a link farm. The embedded URLs, such as 'https://cctraff.ru/wb?keyword=traffic%20racer%202d', are indicative of phishing or malicious redirection attempts. The large number of external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/wb?keyword=traffic%20racer%202d In PDF document text
    • https://bovopoboj.weebly.com/uploads/1/3/0/7/130776351/770767.pdfIn PDF document text
    • https://popogupu.weebly.com/uploads/1/3/1/3/131398113/bewujorora.pdfIn PDF document text
    • https://taferirufip.weebly.com/uploads/1/3/4/5/134582969/5252755.pdfIn PDF document text
    • https://musixafura.weebly.com/uploads/1/3/5/3/135321149/6a2fb35463.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/5027126.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/8321056.pdfIn PDF document text
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/4672048.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/16909662794.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunoje/plot_development_definition_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/gary_clark_redskins_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/advantages_and_disadvantages_of_artificial_intelligence.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/cd_rom_games_for_pc_free_s.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEE 4888 bytes
SHA-256: 2661172b5dd4dcae6ebc27b36689474652e8c065c9650c740130ec8dad6e0093
font_01_sfnt_off0000cf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9B 11220 bytes
SHA-256: a4a458cfc6766daaaebf81eb04623b49f8d9d9413f052fa8ce071227c78f643a

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