Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2b3b0a0dba3767…

MALICIOUS

PDF

43.7 KB Created: 2020-10-27 20:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8b251dd309ebdeeb9cddb9a852a251c0 SHA-1: 91fa7b53141922f5c96b0d1d6ed6b3829824f7d1 SHA-256: 0d2b3b0a0dba37674ccdaf7e2d357851344ea4e577aef12d1976e66b19001562
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or SEO link farms, indicating a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs, such as https://ttraff.me/123?keyword=cuentos+de+ciencia+ficci%25C3%25B3n+largos, are indicative of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.me/123?keyword=cuentos+de+ciencia+ficci%25C3%25B3n+largos In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f872fc74c42f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_5f97a58dec2b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f98289a28af8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5f8fb5b6b15d8.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/mipemasefogexe-xurif-rezinurimojoj.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/2aa9b267-e61a-44c8-b352-fd9b9c545168/zoregijewurufikurenute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8cdd85-c19c-4928-9f3a-60b993a4f65f/wazop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fe6db7-af5a-4044-829c-3522c8fd1053/rularifasawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0b5868-5efe-4cdb-b6ba-29b2c7c93763/best_hacked_minecraft_client.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded64a78-a270-44ae-aa56-f66c618dde73/58895865017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d60eaa2-e4ec-4791-8e99-b74403c3f4b7/49282064184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107f1825-92fa-4b9c-a022-8e070ea675e5/nadamedadela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090e5cd6-1449-47f6-8a0e-bd06ddcdfccf/48735113273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b1aaeb-8267-41c2-ba54-fb19ea31d11b/beviwikif.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_off00006a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7D 5232 bytes
SHA-256: 0be6ea0bd29f9207ac43c150e99eef5f3349214d19a7497ebdd621b88449c0ea
font_01_sfnt_off00007c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C17 11052 bytes
SHA-256: 5e51502ccb2bfa01c5ee7510b20b9cbf4090805590e45a0624b8555cb14c57dc

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