Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9667905ea21840…

MALICIOUS

PDF

76.5 KB Created: 2020-12-19 21:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0f27422db4dfb89abcf5289c6793b744 SHA-1: 9f09a5951c84fd23e37dcff4580d57f167c90559 SHA-256: 2c9667905ea2184023b6f651ec2c75bbacf35cb46ba90a7bd4f0aff11995b4a3
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document functions as a link farm, embedding numerous URLs that lead to other PDFs or redirectors. The primary malicious link identified is https://traffine.ru/wb?keyword=girl%20hero%20costume%20montage%20photo%20editor, which is flagged as a malicious redirector. The document's structure and embedded links suggest an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/wb?keyword=girl%20hero%20costume%20montage%20photo%20editor In PDF document text
    • https://static.s123-cdn-static.com/uploads/4448733/normal_5fc56b61c5b07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f8a248f471cc.pdfIn PDF document text
    • https://mixodozom.weebly.com/uploads/1/3/4/3/134333910/1359049.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/fe9dfab248123a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_5fa2242644949.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/duruja.pdfIn PDF document text
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/5c8bb93b0bb6e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474987/normal_5fd7880614e4f.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/d4677d2f-2613-451b-9bdd-623cf9bfc0fa/cbs47_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63584b82-693c-44ee-a6a9-d2ceb2fb2ba0/42443078150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764c3872-79af-4252-a972-cf94afe2d9b7/wekerokejixapitexobosixa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc147a892c50b1a1e7a1756/t/5fc5e52808845d092456d58e/1606804778283/simpsons_tapped_out_unlimited_donuts_2020_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ca71af-f0b4-4f48-9923-c662b485dd31/21120510228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8bf4e2c-525c-48be-8ac4-945a9dcb5448/dagitinogisipovas.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/doraemon_game_android_by_technical_boy.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E6 5520 bytes
SHA-256: 39ff643477d85c4822702d3aac032eece0377443619dda24e8820b731f98472c
font_01_sfnt_off0000d374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 6460 bytes
SHA-256: 259fabb8357d870b7e1284a2f3c021cd7a83d641f8f90edbd93a825c26e21017
font_02_sfnt_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 10292 bytes
SHA-256: 326fa855ee2c3133e66fc45b6598757a1c95869140b2fe287a24b1d96b3a887c
font_03_sfnt_off00010ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 16300 bytes
SHA-256: a4bac842a96c639db7d5195cfa652b5ac3ce6bb2f8d6e153aa516e59b3036394