Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daa61c84777d460…

MALICIOUS

PDF

67.4 KB Created: 2020-11-14 20:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c4a7f1bfb8618d085a0b53062655e7f3 SHA-1: 237e93a8deb1b4e2a509240808aba01e364575c3 SHA-256: 6daa61c84777d460fbd5d8dd887b8dfca87bc2962958adfb099b41bd35772b76
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link to a known malicious redirector, ggtraff.ru, disguised as a definition of 'exigence'. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDF files, suggesting a campaign to generate traffic or distribute further malicious content. No scripts were extracted, but the presence of a malicious redirector URL is a high-confidence indicator of phishing or malware distribution.

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://ggtraff.ru/123?utm_term=basic+definition+of+exigence In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5fa7914c7f4e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f9af31c0f3f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_5fa011da95bce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f91c4c494f51.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/40b808dd9b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f91807200303.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c92c7b-987d-44f7-8a20-f569a15634fc/6295086166.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/luzudopabu.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/when_is_eid_ul_adha_2019_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/96590678147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586e29c5-e4bc-468f-9e26-7359a963bf9c/birijuwajut.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_off0000c860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC860 5176 bytes
SHA-256: 2e891e527626e7f93e8ca29a60a72d7067d28d6ad96c2674c6bc77e2b7e9a1b4
font_01_sfnt_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 11416 bytes
SHA-256: b9883644179d8b8089ef7659f7e3cb1dcbe7be54ea43d22d3281f01760555892

Open this report in the interactive analyzer, or submit your own file for analysis.