Malicious PDF — malware analysis report

Static analysis result for SHA-256 502033a02d19ff73…

MALICIOUS

PDF

106.5 KB Created: 2020-12-28 06:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cf0565b546d45d03df58e22c4300246f SHA-1: 9321015e8f14915ee70e0fc7374ba51e4b02f86d SHA-256: 502033a02d19ff732aad073d79f9064cb35c770c18bfeec81a5aa83a53606e29
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, and contains links to known malicious redirector infrastructure. The embedded links, including the primary one to `cctraff.ru`, suggest an attempt to direct users to phishing or malware distribution sites. The document body, though heavily obfuscated, contains text related to 'Sioux falls school district payroll calendar', indicating a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=sioux+falls+school+district+payroll+calendar In PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/dowatem-fidavowusowari.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/jShbHZu/hill_climb_racing_online_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/igojeoD/rutuwax.pdfIn PDF document text
    • https://cdn.sqhk.co/zixajofazadi/hezgijb/gekufozekidoxujususobabi.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/87fda18c-e8b6-4f95-9254-fe527a051281/83324991216.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/clown_2019_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/free_invoice_template_for_apple_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/breast_cancer_staging_nccn_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b26f99ca-bb49-4389-9d28-e7bb039d89e2/gigej.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/double_bubble_map_template.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/50463671104.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 1

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_off00016417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16417 5516 bytes
SHA-256: d69bf5d30d7df2800a2c3eaf96d115b55e25ae1781a203f80765823177e3b5fc
font_01_sfnt_off000176e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E5 11232 bytes
SHA-256: 3482e8975a84be2610088fad5140fc7f5a55dc3d2cf626870d66a6d083e00849

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