Malicious PDF — malware analysis report

Static analysis result for SHA-256 3450a5aeffa58122…

MALICIOUS

PDF

48.1 KB Created: 2020-11-05 00:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0da3b6b17b76af0c510bcd24ffee6624 SHA-1: 3fb15d48b476d582e1186484c73c8e5be92e8b28 SHA-256: 3450a5aeffa58122694ade0a8dfce5fce30e886ac4393238b79c827e5ca6ea54
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The heuristic firings confirm the presence of malicious redirector links and indicate the PDF is part of a link farm hosted on disposable infrastructure, suggesting a phishing or malware distribution 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 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://gettraff.ru/strik?keyword=norse+mythology+pdf In PDF document text
    • https://rirulejirosajis.weebly.com/uploads/1/3/4/3/134320684/fixelimejo.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ad9d4.pdfIn PDF document text
    • https://kilorokininoru.weebly.com/uploads/1/3/4/4/134470368/topozup.pdfIn PDF document text
    • https://xezefamije.weebly.com/uploads/1/3/4/3/134352880/zefusevesebabaj-xudoke-risin.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zevilaxerizixi-nored-pisuzarefa-kodeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416332/normal_5f96682422e27.pdfIn PDF document text
    • https://tovegema.weebly.com/uploads/1/3/4/5/134505564/wixat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5f9215a200796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_5f97b27348979.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/wexoteluwag/vecna_stat_block.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/26484558141.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/bihar_board_10th_routine_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/sevituzojimasa.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/fedobuvaburanebeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a36da7-f6a0-4791-802a-0919bab15ed0/echappement_inox_sur_mesure_paca.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_off00007d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D97 5316 bytes
SHA-256: 8827fe2418f5e0a2bae85b1fe975468c4d39b8eb084297c419b0863716eb4593
font_01_sfnt_off00008f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F94 10548 bytes
SHA-256: 931263b398dc0b2bd9360d00f7f72ef489d83ca2360ef5ee685f5fc50da56105

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