Malicious PDF — malware analysis report

Static analysis result for SHA-256 4718dc3f4fe73ebc…

MALICIOUS

PDF

77.7 KB Created: 2020-11-22 17:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6256c538c21360e13178bb3051c4d99f SHA-1: 11a8c66f6d56caccd2e07216fbbef7446c5b3f43 SHA-256: 4718dc3f4fe73ebc9e50a34e927c32a82545d3d9e7fed9e960a1034112ad062d
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, with a critical ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs, particularly 'https://cctraff.ru/123?utm_term=nasi+lemak+lover+sponge+cake', are flagged as malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=nasi+lemak+lover+sponge+cake In PDF document text
    • https://s3.amazonaws.com/divexikav/71952454281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f94bc3a7c9e6.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/8b2901d9.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/wuwor.pdfIn PDF document text
    • https://kujavubudiza.weebly.com/uploads/1/3/4/4/134497056/ab82979670bca5.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/pa_doe_license_availability.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/10609751428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_5f9e4e2458ca0.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/lentiform_nucleus_function.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/benim_hocam_tyt_tarih_ders_notlar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5fad43d43ff6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93fd0c4-fed3-4a8b-a99e-2e2cbefe6645/epson_workforce_630_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e8c7dc-d125-4d42-9586-337e6c9f0d5f/32759752767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d210f018-2127-4b14-bcf7-abc0c384b668/morufagazitolexasefarimov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a08089e-9d52-4c7e-b434-7ab5bccf2497/monsieur_ibrahim_et_les_fleurs_du_co.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDF 5500 bytes
SHA-256: 3e48659b41b62f8e2a0b52557306a8573b719d6c465057a79661ea92d413bb11
font_01_sfnt_off0000e2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CE 5348 bytes
SHA-256: f5afddbb9a64454f4c8f486da41e4c4657d84e0b86d41a8ffec502aaa2de8bd2
font_02_sfnt_off0000f4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EB 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_03_sfnt_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 10528 bytes
SHA-256: 296e10345e920fe87969e37a591ad3d238b02f3edb4d7769381b4c4a43a1cf36