Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4799182df802152…

MALICIOUS

PDF

41.9 KB Created: 2020-10-09 01:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d753e2ffdee63d834405ec47e35e0aee SHA-1: 62cdb618280e7990dcf932cc2ba94d4da6139f3e SHA-256: c4799182df802152b3d4402e1b697a0bbe3ad4b5058bcf8c10aaf03eb1b2bcd9
192 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to potentially malicious content, masquerading as a movie download. The primary redirector URL is https://ggtraff.ru/strik?keyword=fast+and+furious+7+720p+dual+audio+free+download, which is flagged as malicious. The document body also contains obfuscated text and embedded links, further supporting a malicious intent to trick users into downloading unwanted files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=fast+and+furious+7+720p+dual+audio+free+download In PDF document text
    • http://files.yorkshireweeklynews.co.uk/uploads/1/3/0/8/130814408/db9afe5eb.pdfIn PDF document text
    • http://muzuwasos.simplicitylavenderfarm.com/uploads/1/3/0/7/130776533/jogurojujexiweruvawu.pdfIn PDF document text
    • http://files.popmovee.com/uploads/1/3/0/9/130969322/xuwubagabiwena.pdfIn PDF document text
    • http://files.whimsicalreflections.com/uploads/1/3/0/7/130775907/0fe10802fcfd642.pdfIn PDF document text
    • http://files.lifeschool-education.com/uploads/1/3/1/4/131483719/8486108.pdfIn PDF document text
    • http://files.cakelaine.com/uploads/1/3/2/7/132741110/rubilemi_luruxogig_foririsudifiri.pdfIn PDF document text
    • http://files.drtadeusik.com/uploads/1/3/1/1/131163666/7340044.pdfIn PDF document text
    • http://lisenow.inspectmyhomehpi.com/uploads/1/3/1/3/131398455/7e90f98686df44.pdfIn PDF document text
    • http://sunojij.writing4apurpose.com/uploads/1/3/2/6/132695832/5492604.pdfIn PDF document text
    • https://site-1039135.mozfiles.com/files/1039135/rupapugom.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/94875460275.pdfIn PDF document text
    • https://site-1038494.mozfiles.com/files/1038494/41827573847.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/86472404330.pdfIn PDF document text
    • https://site-1042677.mozfiles.com/files/1042677/pividi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/bopan.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/rightsIn 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_off000064fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 5436 bytes
SHA-256: 397ccb8cd8eef51c2fceba9338a7b41312f878ad0f42295f7109c48f5e90dd96
font_01_sfnt_off000077a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A6 10392 bytes
SHA-256: 13c1b65f66759c57e17d762cdfa7e3dc3449a79868e5513a18a713c613ffb75c