Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c06302e4f997ab…

MALICIOUS

PDF

44.9 KB Created: 2020-10-28 05:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e02c43dadc7a1b71adc7288f471b38ce SHA-1: bd05162d97fe031ce04cfc02692620eb92da2235 SHA-256: 58c06302e4f997ab1c562142c797259acc9b7a42bec67fb2264f0aa794606259
192 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains numerous links to external PDF files, suggesting a link farm designed to redirect users. One of the primary links, https://ggtraff.ru/strik?keyword=ncsbe+absentee+voting, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to absentee voting and includes this malicious URL, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/strik?keyword=ncsbe+absentee+voting In PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/893689.pdfIn PDF document text
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/7132e5fd1ba.pdfIn PDF document text
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/toduxe.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1813217.pdfIn PDF document text
    • https://kajibelewori.weebly.com/uploads/1/3/4/3/134307873/pikidow_kizemasufunuz_tuveropolig_xigasufafedoza.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/8166145.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/5725e.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/414489b0-f00d-477d-9fe4-5dcf51157cfa/nolatujok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7896d92-acb7-49ef-8f84-a0f90539d352/lajadinod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab47b0d-f3c1-4f09-8e20-3b21ca6f6b8c/tejelugisejejunufiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d49a49-e2eb-455a-8e7b-de70b79b5dbd/394252629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8425c1-7e47-4951-a07c-48fcce4ba18f/tevogisud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73127f27-0e54-4540-b27c-a36f1250540b/xabimapejorurovozila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6687/8869/files/65248090519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/63875751387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/munchkin_epico_regras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7764/1409/files/20209330352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8099/8298/files/josaratilobiralu.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_off000071d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D8 5008 bytes
SHA-256: 9fdf99294da0dd95a17f0fa492bb9458143144a102e4612f53ae31806efb0d5d
font_01_sfnt_off000082fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FE 10552 bytes
SHA-256: 0a8d4b4afd9c3151638f0358c9ff5bf905e1a5ac3202c58db256896f3ce6a5e0