Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78162da82f6edf3…

MALICIOUS

PDF

45.8 KB Created: 2020-11-01 04:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c7c87d15c0540e371156552ab26b2e0d SHA-1: c104f967af11835f4741ced6212a74a86ce29073 SHA-256: c78162da82f6edf39598d862b12080694a33b83ba4a1d2652455aa08a2b70ee0
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to drive traffic. One of the embedded URLs, https://cctraff.ru/pify?keyword=d%2526d+4e+weapon+list, is identified as a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link distribution scheme.

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/pify?keyword=d%2526d+4e+weapon+list In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://tizijepen.weebly.com/uploads/1/3/4/2/134234944/serafukilasudisi.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/jirogiramupe.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/lejemaminudorava.pdfIn PDF document text
    • https://vemowidododujev.weebly.com/uploads/1/3/4/3/134353566/296f5.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/dowomaxaviri.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/4931230.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/60339226.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/sutarot.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/wonoti/42935948243.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/84750695155.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/biodegradable_plastic_from_cassava_starch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b9299e-ff0b-4221-a187-f607236a6625/migewob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e018b7f4-9e4f-454f-852c-4c5a50a63270/nokokagigoriwebijaja.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_off00007882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7882 4156 bytes
SHA-256: 58eabb24298f18ab3cb5c3f3a5652a185830994b36fd37cd9ad46fcf77495092
font_01_sfnt_off000086b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B1 10512 bytes
SHA-256: 235a50bb18728514bf23f0b708fc1c770614463975ee06be1b50ec99982219d1

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