Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d370cbac6c2533…

MALICIOUS

PDF

52.6 KB Created: 2020-10-27 00:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa126b670d578482ebedd9782313d980 SHA-1: 1d5da08d6ace1705caff9d3a603b88e370fdb5f8 SHA-256: 02d370cbac6c253351b96c5bda6816bad3aa98488e349b02e611b4b62dc1821a
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/strik?keyword=cool+coil+pot+ideas
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f89c7598c9a5.pdf
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5f8f99c8d375d.pdf
    • https://kesolijizik.weebly.com/uploads/1/3/4/2/134265964/d95139b.pdf
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/visewelef.pdf
    • https://bininadaxirag.weebly.com/uploads/1/3/4/4/134475951/8964240.pdf
    • https://zifusotoxiwi.weebly.com/uploads/1/3/4/4/134476210/ranekilakabugufepam.pdf
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/1482248.pdf
    • https://naxufubiromu.weebly.com/uploads/1/3/0/7/130738890/lulozepufirisun_pekodipib_lulajirir.pdf
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/6701395.pdf
    • https://pexazunawilaga.weebly.com/uploads/1/3/4/2/134265520/popawavikip-folirivofu-patokakebaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a2e05d6c-4f87-446b-931e-42861be17ece/99975784376.pdf
    • https://uploads.strikinglycdn.com/files/cc5c2369-6725-4254-88d4-87e9f898491f/woberof.pdf
    • https://uploads.strikinglycdn.com/files/b28d4e3d-3857-4be0-8f16-5cac97eb9cfd/rididotixakonorik.pdf
    • https://s3.amazonaws.com/widuxade/xurefupuzorumogogodeneve.pdf
    • https://s3.amazonaws.com/jumedemimo/jofika.pdf
    • https://s3.amazonaws.com/wonoti/anti_ragging_law_in_india.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_off00009053.bin
069988d55f43a276104f2adab4adf14a4a2055b7ee82e02cfcf48ccb70b00a70
pdf-font-stream PDF embedded font (sfnt) at offset 0x9053 4876 bytes
font_01_sfnt_off0000a0ec.bin
ae69c76941261aef7482f589b71bebd7532333fa08b1a70bd306086d684e493e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0EC 10844 bytes