Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2b8be2ae736ad7…

MALICIOUS

PDF

42.5 KB Created: 2020-10-27 21:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4456deccf1713dfe7a8aea1925a00a00 SHA-1: 1d39957d93e1dcd004d901375ac705b5409a7ef8 SHA-256: 6d2b8be2ae736ad7df115970eaea12cc33abe69a37b5f48c36785e04af532131
154 Risk Score

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 a link farm infrastructure designed to redirect users to potentially malicious content. The primary redirector URL is https://ttraff.ru/123?keyword=sas+difference+between+two+dates+in+years. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to lead users to malicious websites, likely for phishing or malware distribution.

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.ru/123?keyword=sas+difference+between+two+dates+in+years
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5f92915d47c4d.pdf
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f88ec7da4855.pdf
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f966be4a3fe6.pdf
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f8f4c090e23d.pdf
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f875248d50ba.pdf
    • https://cdn-cms.f-static.net/uploads/4381302/normal_5f8d59183425b.pdf
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f89eaa540a97.pdf
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f9199e15e38d.pdf
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5f94d2d22c1ef.pdf
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f923f21a47cf.pdf
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f932370e9432.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ffaac3ac-031f-47ce-9a80-a4a435a50a5d/77781520266.pdf
    • https://uploads.strikinglycdn.com/files/a88982c2-584c-4765-a7dd-e1685c810105/descargarelement_6_pro.pdf
    • https://uploads.strikinglycdn.com/files/88987bfb-e15b-453f-b4bb-2827f1ca76a5/gezesazufevo.pdf
    • https://uploads.strikinglycdn.com/files/7b14a8cd-4418-48a8-8c30-8a5f45c852c4/nbr_8160.pdf
    • https://cdn.shopify.com/s/files/1/0502/6712/7963/files/dungeon_masters_guide_firearms.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/zerawefinis.pdf
    • https://uploads.strikinglycdn.com/files/d9ff905c-e6da-425f-8606-903e555a627a/miwagolumal.pdf
    • https://uploads.strikinglycdn.com/files/7afd86e7-c27c-46c7-93b0-b309c026c6d1/silent_crusade_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cf.bin
bcaadacf767d36781535c23ff55a178fcec82eeb6c9484498cf038b44a4d0138		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 5420 bytes
font_01_sfnt_off00007751.bin
74c3ad84e4cfd7d2c6acc87817568e7a192b336c088f0a59080c7d8a37770d3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 11088 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.