Malicious PDF — malware analysis report

Static analysis result for SHA-256 45368bb784a51a45…

MALICIOUS

PDF

37.4 KB Created: 2020-10-03 04:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fd6cb422e7eec74a44090cefbb9b6eeb SHA-1: 84304368b20a12e5de61d5ebb565c8ddd522b8aa SHA-256: 45368bb784a51a45a59f038345a6d5f0087ad3570bcb485648af5e9886f8dfb4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to disposable domains and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://cctraff.ru/strik?keyword=john+deere+x350+manual+pdf, suggesting a lure for search engine optimization or to redirect users to malicious content.

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://cctraff.ru/strik?keyword=john+deere+x350+manual+pdf In PDF document text
    • http://pamudeki.ragsdale-music.com/uploads/1/3/0/7/130739206/tobifuratazer.pdfIn PDF document text
    • http://files.everypedalmtb.com/uploads/1/3/1/3/131381681/3629613.pdfIn PDF document text
    • http://salul.rainylakelabradorretrievers.com/uploads/1/3/2/3/132303195/gonipib.pdfIn PDF document text
    • http://files.voodesigns.com/uploads/1/3/2/6/132681861/xewiwed.pdfIn PDF document text
    • http://files.paigesinkler.com/uploads/1/3/2/6/132682039/ratata_dumope.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/balijarozaforaxo.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/zopiwulimiguxukan.pdfIn PDF document text
    • https://site-1040095.mozfiles.com/files/1040095/67466288818.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/vaforowovasudulifa.pdfIn PDF document text
    • http://files.911professor.com/uploads/1/3/1/1/131163660/2498495.pdfIn PDF document text
    • http://files.whereinthewhirledisjon.com/uploads/1/3/1/3/131381677/ligikobugifizadusawe.pdfIn PDF document text
    • http://files.kobfah.com/uploads/1/3/0/7/130738701/4e56a926243db75.pdfIn PDF document text
    • http://files.cvmrc.co.uk/uploads/1/3/1/1/131164130/dab399190b669e3.pdfIn PDF document text
    • https://site-1036721.mozfiles.com/files/1036721/88274729273.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/dakexuzixagojovefuzirupaw.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9F 5592 bytes
SHA-256: 06ac31af81dece4d9ac7b263f7176ea4119668b2e1f573ee26323990904cba93
font_01_sfnt_off00005e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 13760 bytes
SHA-256: 86f66a78c0b547a290db7f898e0cbf6f6f5a05702b7e199f8cebacddc9aedbfd

Open this report in the interactive analyzer, or submit your own file for analysis.