Malicious PDF — malware analysis report

Static analysis result for SHA-256 450e60115181f741…

MALICIOUS

PDF

44.2 KB Created: 2020-10-01 20:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 22a927d328a09b65d52ffa08906c5a4e SHA-1: cae04e1984d9b0d07d357a85f84c1db5bbecaaa0 SHA-256: 450e60115181f741d349b3f64e88394d762e2cf494a97cb5e52d601b908713de
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure. One prominent link, 'https://ggtraff.ru/strik?keyword=new+headway+beginner+student%2527+s+book+3rd+edition+pdf', is identified as malicious redirector infrastructure. The document's structure and link farm behavior suggest it is designed to lure users to malicious sites, likely for phishing or malware distribution.

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://ggtraff.ru/strik?keyword=new+headway+beginner+student%2527+s+book+3rd+edition+pdf In PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/xujatituvidoxujel.pdfIn PDF document text
    • https://site-1036883.mozfiles.com/files/1036883/bodibod.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/defebedulexok.pdfIn PDF document text
    • http://files.estevezdesigns.com/uploads/1/3/1/6/131606256/sifolubo.pdfIn PDF document text
    • http://files.drlinkedin.com/uploads/1/3/0/7/130739204/busasamozi.pdfIn PDF document text
    • http://files.mplsimpulse.org/uploads/1/3/0/9/130969935/nilazopo-folirobepi-lajulosutatime.pdfIn PDF document text
    • http://files.actualizeconsulting.com/uploads/1/3/1/3/131384301/dirufagamevuvaluxixe.pdfIn PDF document text
    • http://belotilup.homecade.com/uploads/1/3/2/6/132681488/lesovatug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0641/1431/files/sara_kruzan_ear_hustle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5192/7720/files/wotlk_lw_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3299/7788/files/download_windows_loader.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E86 5716 bytes
SHA-256: ef6cd77338f5e213ba2946b13f224ba608d542fd990886619c5552b52ba32259
font_01_sfnt_off00007215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 10368 bytes
SHA-256: 670e7236e2f402e04a7761ce499fb0271ed226cd8ddabbd4fb048ae65e32313d
font_02_sfnt_off00009584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9584 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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