Malicious PDF — malware analysis report

Static analysis result for SHA-256 660049eae74f935a…

MALICIOUS

PDF

49.0 KB Created: 2020-10-05 12:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b1d8cae332349c57d49bde0e4e6efce6 SHA-1: 498332b33b00fe4a6cad5a1c3a7347270c5c186e SHA-256: 660049eae74f935a0c74116342ae01d1c9c40af366fe430ee60ad128967b7dce
184 Risk Score

Malware Insights

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

This PDF document contains a link farm pointing to numerous disposable domains, with one prominent link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ggtraff.ru/strik?keyword=soda+pdf+problems', suggesting a lure related to PDF software issues. The presence of multiple external PDF links and a critical heuristic firing for malicious redirector infrastructure indicates a likely attempt to lead the user to a malicious site.

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=soda+pdf+problems In PDF document text
    • http://dereb.greaterfayettecountychamber.org/uploads/1/3/0/8/130814340/8103237.pdfIn PDF document text
    • http://files.sjssa.org/uploads/1/3/0/9/130969548/wokagujidowivozozobo.pdfIn PDF document text
    • http://files.ndfresearch.com/uploads/1/3/0/7/130776157/tabonezitunusaw.pdfIn PDF document text
    • http://files.newtowneplayers.org/uploads/1/3/1/4/131453255/3434eb86f4f59.pdfIn PDF document text
    • http://vexaz.avalon-hairdesigns.com/uploads/1/3/2/6/132695328/4603897.pdfIn PDF document text
    • http://nosemik.mollykfleming.com/uploads/1/3/1/4/131407406/pitilexiwujo_roluvifa_raraketupu_nololesi.pdfIn PDF document text
    • http://vifadad.apriltowriess.co.uk/uploads/1/3/0/7/130738711/cd6694785.pdfIn PDF document text
    • http://files.triciavanoostveen.com/uploads/1/3/0/7/130740586/3862902.pdfIn PDF document text
    • http://files.governmentgrants.net/uploads/1/3/1/8/131856278/tarigowepupubidop.pdfIn PDF document text
    • http://files.rorxpa.com/uploads/1/3/1/3/131398123/16a2b299c4c.pdfIn PDF document text
    • http://mosopijo.mcdanielschoollibrarianship.com/uploads/1/3/2/3/132303382/rimubam_tawat_fidanefa.pdfIn PDF document text
    • http://mapiri.naiadflowyoga.com/uploads/1/3/1/6/131636725/muwalejoviwora-vegiru-vorutinod.pdfIn PDF document text
    • http://files.ravenbeak.com/uploads/1/3/1/4/131437655/612f0471.pdfIn PDF document text
    • http://files.bleedingheartsbotanicals.com/uploads/1/3/0/7/130775221/2089274.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8149 5428 bytes
SHA-256: 730bd2924acec17db2be46c888584062809193c0a01393667612c62423ff7fe8
font_01_sfnt_off000093a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 10504 bytes
SHA-256: 7952768a72067eadcc770d745e8913c6fc9f5a293b64bdee66a8913a1ae3a21d

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