Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b8f9de38691a95…

MALICIOUS

PDF

69.6 KB Created: 2020-11-24 16:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2f27055e80e3fecca9833be0f6aaf1e5 SHA-1: 7c778ccab7bda6faf5926a94c298a0644662a337 SHA-256: 03b8f9de38691a95ba7773739cd0e100e2d2ceed26749f7aad462b8e551a7321
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 multiple embedded links and heuristics indicate it is a malicious redirector and link farm. The primary redirector URL, https://cctraff.ru/strik?utm_term=battle+cats+cat+food+hack+reddit, is used to lure users with deceptive content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • 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://cctraff.ru/strik?utm_term=battle+cats+cat+food+hack+reddit In PDF document text
    • https://woviximanikiz.weebly.com/uploads/1/3/4/6/134693880/gepeturosenavaxemale.pdfIn PDF document text
    • https://xiwofisenitew.weebly.com/uploads/1/3/4/8/134879753/renerokesukidej.pdfIn PDF document text
    • https://pativezakuzorad.weebly.com/uploads/1/3/4/2/134266084/rumamomewakep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8711b003-c444-45ff-97be-b733411f283f/sevutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831f80cb-e533-4b79-bd43-3e89acfcd8b7/gta_san_andreas_trke_yama_nasl_kurulur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56d99bb-01ee-4cb4-9dd2-66ed660f9496/93305198183.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/5505790568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7e7480-2a0e-4c42-a6a1-fb9797d73ba6/rageaholics_anonymous_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7271b8db-359f-4a06-ba00-ba9316488e6b/22916224171.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC520 4904 bytes
SHA-256: cd180e2942a1c1fa52b31467baaa1c1b557f39873822b7ca821d593a8483fb31
font_01_sfnt_off0000d5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D6 10596 bytes
SHA-256: 90c8798b3743c321e57b30ef8171abde730b0fffe7c8100e38da362562181118
font_02_sfnt_off0000f9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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