Malicious PDF — malware analysis report

Static analysis result for SHA-256 6518e99a22a27b95…

MALICIOUS

PDF

73.4 KB Created: 2021-01-01 19:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 47ee7f3395c3b2d42d7bf00af41c850e SHA-1: 412bee8962ff076d3d9b89691f7d7fc77a0919e9 SHA-256: 6518e99a22a27b953098f2a6fcc938b36907f92054125b8c5c500187f9a6f2d9
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to redirector infrastructure, specifically identified as an SEO link farm and a malicious redirector. The primary malicious URL, 'https://ggtraff.ru/strik?utm_term=black+christmas+free+movie', is used to direct users to potentially harmful content. The presence of multiple embedded links and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=black+christmas+free+movie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_5f974f02858c5.pdfIn PDF document text
    • https://ruwivusufosodup.weebly.com/uploads/1/3/4/5/134527703/biderazevovafi.pdfIn PDF document text
    • https://foposivore.weebly.com/uploads/1/3/4/4/134472686/jusumakamuni.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/bWZiTgd/rafadutamazenujuv.pdfIn PDF document text
    • https://cdn.sqhk.co/xijisejes/ZbKlsyA/pepper_iron_man_3_powers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452171/normal_5fa3d7400c0da.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.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/3c06399d-5071-41dd-8c84-d8c6626159b5/puverameg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56315040-521c-440a-a1bf-17405c505a57/hymn_for_the_weekend_piano_sheet_musescore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e9e162-668e-4a5d-ba36-bc2b31bf0e00/gakovegi.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/54974411148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ee6bae-aea3-4438-b7d7-b1d6ead50f1d/minecraft_world_edit_download_1._16._3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe1348a-846d-4483-b836-41653c458d70/19629412790.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 5296 bytes
SHA-256: 9d0ddc909efd00d1602285e6200079d23f237c8b8e0dfeb42cab407d77220605
font_01_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 10384 bytes
SHA-256: 9c87acc9fdcb8e8600c4e563aa9775de38c4271118f6e5520fe07f6c1feceb29

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