Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9da6960f5a618d…

MALICIOUS

PDF

63.8 KB Created: 2020-12-31 22:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a19a6eda979d02cb5718037439e71075 SHA-1: 6280b5756b89f15ac07f4bcea5ecd0bbc92346de SHA-256: 5c9da6960f5a618d94424d7808e7739b7df382a15cca57fd1aae7397785acbd9
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a link farm. The embedded URL 'https://traffine.ru/123?utm_term=marked+novel+audiobook' is identified as a malicious redirector, and the PDF also contains a large number of external links, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=marked+novel+audiobook In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_5fa65dcbaed2e.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/2674162.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/vuzufexarevima/luvitotefi.pdfIn PDF document text
    • https://s3.amazonaws.com/xotorulu/lusoxazuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd987ad-a69c-4225-af61-f10a6a18238e/86187118761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427cde73-d425-4bf7-8642-939ddbe7e018/76813965906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6711ac-0d62-4012-a33f-9e2d23403876/day_r_survival_premium_mod_apk_latest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a8eb5b-839c-42d2-8a27-e46c527661b9/78082698731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53089023-4902-4efb-b58d-cce5d439ca83/fawubazaturumefifaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352bc995-8d92-4b13-9208-045a92f99192/sawagegak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127ae821-9392-4c88-b831-888a6e06fba8/white_rodgers_thermostat_manuals_1f78_151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e92dc8-38e8-4f8a-baf9-03ccf3ace1f0/famise.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_off0000c138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC138 4908 bytes
SHA-256: 33638504d90fbb8834b6528a5178dc5e1be94f5ab93ebdfdf6fb3f78dad7c85a
font_01_sfnt_off0000d209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD209 9664 bytes
SHA-256: 3963e24eceb43d4f1c3a2772de54a07a3a4e1f2893cb39fccbbdc6401b0d515e

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