Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3677d153da851bf…

MALICIOUS

PDF

42.4 KB Created: 2020-10-30 05:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 87fa465c5f9d4781ccb032268d8295c7 SHA-1: eef42fda7f44311e113f6917398e06ced0073796 SHA-256: b3677d153da851bf2a85ecff48ebaec359e4eab357ee702eaeb538ffaa4ae33b
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://cctraff.ru/123?keyword=coaster+furniture+reviews+leather, is flagged as malicious. The document's structure and embedded links suggest an attempt to lure victims through deceptive content, likely as part of a phishing campaign.

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 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.
  • 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/123?keyword=coaster+furniture+reviews+leather In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f900a09be27f.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/fejuk-faxiwubofake-rivanidi-jovev.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/b34b548fa261374.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/wudukuwul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f8ac7d91e970.pdfIn PDF document text
    • https://vofixerexelisat.weebly.com/uploads/1/3/4/3/134311693/115212.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/fagawuwawosaxomepob.pdfIn PDF document text
    • https://zunuduzeguw.weebly.com/uploads/1/3/4/3/134344012/8516461.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/7553553.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/10610.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/xatipivutod.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/c8fb7fde0bc355.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/pizesutadimejabu.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/physiology_of_lactation_breastfeeding.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/dofowevate.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/voter_list_rajasthan_2014_download.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_off0000666c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666C 4912 bytes
SHA-256: 52cbbb742b442df8aa573a4209b931736ff929126960a043d8808857d7129d59
font_01_sfnt_off00007729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7729 10888 bytes
SHA-256: 08a38bbe09f20c222265eb10baad6d689fb0b8ff746d6cf819b35c2342c7af7a

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