Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0236c9e316984ee…

MALICIOUS

PDF

90.2 KB Created: 2020-10-27 22:31:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e7a1b2cac201a89eac79412d1b44caa5 SHA-1: 82a756f5379494f91fe32447ec3e5282a9ccf6d7 SHA-256: f0236c9e316984ee68c1b0d50615156a31b82145e46116991307a2c07a010934
184 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 disposable hosting and redirectors, indicating a link farm designed to obscure malicious destinations. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/123?keyword=great+gate+of+kiev+painting'. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a campaign to distribute malware or conduct phishing.

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.cc/123?keyword=great+gate+of+kiev+painting In PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/0888efd709fa9.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://mujetuzavos.weebly.com/uploads/1/3/4/2/134266282/bdc21ac8cb25dfc.pdfIn PDF document text
    • https://tufelovewojamex.weebly.com/uploads/1/3/4/3/134331554/761617.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/zomelijorokemumawu.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/b3f0c5d4ced9.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/tonot.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/latajomo.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/1862535.pdfIn PDF document text
    • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/mapebujenexaf-lavasaliporugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f8c1069555bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5f966f5fae58f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5f97889b2ade1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f8ef6ed7e6b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f876148dacdc.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/9cd688a7-c1b4-42c2-afbf-5419e177250f/sedemotenufejedepatixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e66c1ac-0df1-44c8-96ab-52b6fd0d757a/98409783409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f626fa-2e33-42d7-ace9-c69ed665d6dd/numitanamafudujaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7235ce3-4bf1-457b-860d-5805c82e27e1/rufikoxebadipetu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 5012 bytes
SHA-256: abedbbfac82e30a81f5d2c2afe7f7595e24cc73de0aaed46d14cd7f27093450c
font_01_sfnt_off000114b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B4 16840 bytes
SHA-256: d54b178a57c510240d6756a9d9dfef13d5dc613f5b99993ffe1abdf42fadb822
font_02_sfnt_off0001460a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460A 16120 bytes
SHA-256: 46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12