Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63e39113a51b54e…

MALICIOUS

PDF

43.4 KB Created: 2020-10-04 08:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9e6e2bf1d0267b4d49bc84fb0f3b72ea SHA-1: ad2a61baac53d342a2cf6e47d3085e1c8204cb72 SHA-256: d63e39113a51b54ebf9c03e77e11a2cf98fc542f18052eaa9c902fc8b1049226
124 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm designed to redirect users to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ggtraff.ru/strik?keyword=bright+line+eating+maintenance+food as pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this and other URLs, reinforcing the attack pattern of directing users to potentially harmful sites. No scripts were extracted, but the presence of numerous links on disposable domains suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://ggtraff.ru/strik?keyword=bright+line+eating+maintenance+food In PDF document text
    • https://site-1039667.mozfiles.com/files/1039667/14301416745.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/bufopemazo.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/93894577011.pdfIn PDF document text
    • https://site-1042867.mozfiles.com/files/1042867/tozugi.pdfIn PDF document text
    • https://site-1037829.mozfiles.com/files/1037829/mulijofojarewutexigofibu.pdfIn PDF document text
    • http://files.allamericandt1.com/uploads/1/3/1/3/131383599/2404802.pdfIn PDF document text
    • http://suvoxu.drlauraforsyth.com/uploads/1/3/1/4/131406799/2796952.pdfIn PDF document text
    • http://files.danielmonfre.com/uploads/1/3/1/4/131453799/befubebugowuv_pajiziw.pdfIn PDF document text
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdfIn PDF document text
    • http://wewuxevij.mastech-engineering.com/uploads/1/3/0/7/130739163/sorasixukipudazam.pdfIn PDF document text
    • http://files.walesbaptisttn.org/uploads/1/3/0/9/130969470/zadabeder-muvipafaloxo.pdfIn PDF document text
    • http://mazaxifa.stepintowomanhood.com/uploads/1/3/0/9/130969341/boperidetuturav.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/a6b0dc51-4b9e-47b7-be7c-72eb61648a86/65934986948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc1e515-4d0d-4658-aa5f-df47c8ed90d0/sisexab.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_off00006c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9D 5304 bytes
SHA-256: c43baf8a56fa15770ccb41d5cabf3733eefef34357b120aab86e8c7dbd3a6ce6
font_01_sfnt_off00007e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E81 10044 bytes
SHA-256: 0b6b26536f885408d8ac70c9fcdaccf764663f83b169170cb5795ee26661e83f

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