Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e15e292b3594c3…

MALICIOUS

PDF

51.5 KB Created: 2020-10-20 09:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c276b85e9be4265883cdd54af010ff84 SHA-1: 9b9df4776699c1fc25e8f6ec9863f7801d2416ff SHA-256: c8e15e292b3594c34c679e19cb3f4d53d2b2e2bea1e2256dbea569866f8704bb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to disposable hosting or redirectors. The primary malicious link identified is 'https://gettraff.ru/123?keyword=sindrome+nefrotico+en+adultos+tratamiento+pdf', which is flagged as malicious. This indicates a link farm or SEO poisoning attack designed to redirect users to potentially harmful sites.

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://gettraff.ru/123?keyword=sindrome+nefrotico+en+adultos+tratamiento+pdf In PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/vagizagunojisexuxon.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/2042759.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/tadetim.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/b7841d6.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/mobuwuwipa.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/jefaneboteranu.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/b29f0904-3400-4cc1-a4c6-911f65a61328/giwodaruxiwev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce8e860-91d9-4c80-901f-a01bc4466d8c/nudatilenavokas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce492c00-7ad3-4ca0-a8e7-e1835009e8c2/rigazezikesupave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b3a8bf-f0a2-4461-a580-ca7264f84876/bidirejobanozopafanel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5918d6e0-0ac5-4b44-bc88-2343b35f9820/fitewukufotarewexax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c676ed14-730a-43d9-9074-297de1bf667b/99614034330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05daf8fa-4e2a-4637-98d3-7e22fbb40e1d/47283558647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595452cf-3efc-462b-8128-338454708e7f/72572555076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394ad9a9-e32e-45e3-b10a-159b5e84b12f/zesokevumisudanuligirali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f196fb9d-f9d6-402c-87c3-1a3c68bfd3db/nowipozezewevedosela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b71cf66-7e4b-46c6-a02b-31574cc14970/rocketdock_win_8_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ac875b-19ee-44ad-b3fb-09ca1d7f8a1e/48015912495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa4d989-1157-4013-9208-12ff6f0ea85f/fovijot.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_off00007aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEA 5404 bytes
SHA-256: 9cb84f20205bb85ae0968f9838a52e16b3b8332fde3c2e2cc8cef2678f7299f4
font_01_sfnt_off00008d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D22 16248 bytes
SHA-256: f6fee78dbc72d6dcc692dcca2666c1a1114ff9bc394dfefe32edc5c70df541a4