Malicious PDF — malware analysis report

Static analysis result for SHA-256 f141e30149fc9e8f…

MALICIOUS

PDF

34.6 KB Created: 2020-10-05 03:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 353a319244dfc0b63de667f499c68113 SHA-1: feaeb31c81f2de27f96a7e2a398ff556cef8606a SHA-256: f141e30149fc9e8f92b0709a4cf77694204c634336d5b19e0e39bb461d873b2a
184 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains and redirector infrastructure, indicating a link farm designed to obscure malicious destinations. One prominent URL, 'https://ttraff.club/pify?keyword=yardi+payscan+instructions', suggests a phishing lure related to payment processing. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

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://ttraff.club/pify?keyword=yardi+payscan+instructions In PDF document text
    • http://files.heretohealthwellnessclinic.com/uploads/1/3/2/7/132740214/1678021.pdfIn PDF document text
    • http://xuvite.bizcontrol.net/uploads/1/3/1/4/131438847/2569817.pdfIn PDF document text
    • http://files.stevetowers.com/uploads/1/3/1/4/131454435/4977381.pdfIn PDF document text
    • http://tiluwami.plateauvalleyanimalhospital.com/uploads/1/3/0/9/130969627/b893b.pdfIn PDF document text
    • http://dekaf.cvillehomeimprovements.com/uploads/1/3/2/8/132814930/bifoxup.pdfIn PDF document text
    • http://pexixasap.bestlawncareok.com/uploads/1/3/2/6/132681579/xiwoz.pdfIn PDF document text
    • http://sulufuw.nscecommerce.com/uploads/1/3/1/4/131453526/debojijapuwuf_vuxukewa.pdfIn PDF document text
    • http://files.everydayarteveryday.com/uploads/1/3/0/8/130813979/guxaxevaduxutediti.pdfIn PDF document text
    • http://files.sp-arms.com/uploads/1/3/0/7/130776509/80307.pdfIn PDF document text
    • https://site-1041286.mozfiles.com/files/1041286/47917153783.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/kodemeva.pdfIn PDF document text
    • https://site-1038690.mozfiles.com/files/1038690/99618920447.pdfIn PDF document text
    • https://site-1040509.mozfiles.com/files/1040509/4647353141.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/3905f3e1-8e5e-4935-bf2a-fc73deaff47f/98812430726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46372eb7-ec36-466b-a7c1-b3fb802e4ed1/ruvufenekadon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cfc21c6-b808-4d32-961a-cf515d9dd003/wakoxuluzomanudab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b152adfe-ea6c-4f49-83b3-a13f74119da5/pefuluzekejewumuwisote.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_off00004ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA1 5096 bytes
SHA-256: bb5a327b1efac1bebb6589ae8d4202bf3bb7d51615bd3ca405351ff698a8fb10
font_01_sfnt_off00005d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D10 9492 bytes
SHA-256: ec90a1710a0c8d4a9d2cf901d118364c6b33aad4387ee7a9b8413367dbb5d972

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