Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c109336afca25b2…

MALICIOUS

PDF

38.4 KB Created: 2020-10-29 03:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4f6023c2d68c0ec51174cd305e154958 SHA-1: e40c13304e387a730486f5dc83b420673fd9bbbd SHA-256: 2c109336afca25b2ba3d2c18d95c074275c989d0177166763b21a83cbcebe6bd
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files across various domains, indicating a link farm for SEO manipulation or content distribution. One of the primary links directs to a known malicious redirector, suggesting a potential phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ttraff.ru/pify?keyword=video+indirme+program%25C4%25B1+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5f976a21261a5.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/9663117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f8745e6a4acb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5f94d77c1cc21.pdfIn PDF document text
    • https://vejegiraforid.weebly.com/uploads/1/3/4/3/134311029/fed77d9b9a.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/8569232.pdfIn PDF document text
    • https://labivuzixifazer.weebly.com/uploads/1/3/4/3/134310915/doluzinagisizaje.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/2748816.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/zakenu_wovanozezavibit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f97ca370d8d3.pdfIn PDF document text
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/8338075.pdfIn PDF document text
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/2909351.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/5603d69e-1b54-4dd4-a3c2-2cde47204826/79486631523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38faa3c1-f482-4a4d-abe7-d45dcf75ac7c/gaxebelariduvig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56356f92-5f37-4d5a-9b2b-adf44ba4ea55/19927971255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d03364-1e47-4964-87b6-9b9087812caa/52003832286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908078bb-5629-4b08-9236-128d2b542870/18601175892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bb4e47-81c0-4d2c-9554-17155a29257a/london_has_fallen_in_hindi_bolly4u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f2463c2-67f6-4221-ab18-81907f7a164f/metro_sim_hustle_graphic_content.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b3eeac-04fc-46cd-b234-188b993d7eeb/makubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f73d76-6ad8-4777-9a15-4987dcb00e43/68539463084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be9cd64-f878-4004-bf49-5dc910542081/78440509428.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_off000053d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D8 5308 bytes
SHA-256: 76f58d4b4afe1860fd2e9da74585d32feff50de8a469a2f7eacd1d76b937bacf
font_01_sfnt_off000065d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 11512 bytes
SHA-256: 3bf6addc55b60d0d799abda2299f6e4827f91a7acf644e7c16750d5185321ae7