Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ad180e0d282288…

MALICIOUS

PDF

70.1 KB Created: 2020-12-02 08:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 516a176af39f68cf85bf545c557ebe6f SHA-1: e2242a1a5c8a55c8569459056803152db5736f6e SHA-256: 85ad180e0d282288d3dd1e59461bbee040090b68ed29ea4ef3be0990e450326f
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to potentially malicious redirectors or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the document is designed to direct users to external, potentially harmful, websites. The presence of a link to 'cctraff.ru' with a 'utm_term' parameter suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=bed+bath+and+beyond+bedding+sheets In PDF document text
    • https://busozovamifolak.weebly.com/uploads/1/3/4/2/134235369/9140571.pdfIn PDF document text
    • https://bedusetifimanov.weebly.com/uploads/1/3/4/8/134846759/fbba2f8560f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_5fc37e3933e82.pdfIn PDF document text
    • https://dizawiwutap.weebly.com/uploads/1/3/4/6/134629961/8424797.pdfIn PDF document text
    • https://zinixukugezevul.weebly.com/uploads/1/3/4/6/134612333/lazelukud.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/23d3953eae.pdfIn PDF document text
    • https://kudigebudubug.weebly.com/uploads/1/3/4/3/134353201/3460370.pdfIn PDF document text
    • https://fupiloxeti.weebly.com/uploads/1/3/4/3/134380404/c83723e709cc.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/dukavunivifa/kusawesegeturetokef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0e84f0-bf31-4b0f-8294-3d176ff60d66/34330095031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba610e82-3c0b-45c8-946a-710e568e84ae/8460642215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8f7985-3ba5-4c91-9bf5-030638f1cc09/elementos_perifericos_de_una_computadora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e24e93-21e8-49f9-a35b-530937529911/46766569365.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/would_you_rather_questions_for_couples.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_off0000d4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 5248 bytes
SHA-256: e91cf64c62588e49a52b71f96af6430ab7dbccba5624c051e03b7d76aab963f2
font_01_sfnt_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 10816 bytes
SHA-256: 959ae6f1ab2faee35361813cccc2add02c00273ff25a0aa1ff4d035d3213d4b3

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