Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7fa8c38f136b34…

MALICIOUS

PDF

36.4 KB Created: 2020-09-28 17:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01f6b9b9d21f103c7fb3e14a483f1334 SHA-1: 04a0a44181efc8e5948cff17087d1107dfada830 SHA-256: 9f7fa8c38f136b34615b4719e501439c7b9d01f99fc685c8799dee2a10991656
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, https://cctraff.ru/mozel?keyword=possessive+pronouns+exercise+pdf, which is a strong indicator of malicious intent. The presence of a visual download button further supports a lure-based attack. While no scripts were extracted, the embedded link and the heuristic firing for a malicious redirector suggest the document is designed to lead the user to a harmful destination.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/mozel?keyword=possessive+pronouns+exercise+pdf In PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/864054393.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/80807366755.pdfIn PDF document text
    • https://site-1037059.mozfiles.com/files/1037059/jimogevun.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/50144301972.pdfIn PDF document text
    • https://site-1036864.mozfiles.com/files/1036864/2994178054.pdfIn PDF document text
    • http://files.colinbergmusic.com/uploads/1/3/2/3/132302780/pewobilobibexejo.pdfIn PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/didowipipa.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/35408126082.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/90013272277.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/lapowobiferogimuralomege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d53a1988-72aa-4ceb-9f10-53238813e393.filesusr.com/ugd/31593d_cb019dc1f19947f3ac15ab1ce4b57a63.pdf?index=trueIn PDF document text
    • https://a5820e90-7c55-49e5-90db-282d7462b1cb.filesusr.com/ugd/60ffa2_fbbce2a806d94419b1c5b8d22d37303e.pdf?index=trueIn PDF document text
    • https://c175abd7-4154-4c5c-b084-e2991f922332.filesusr.com/ugd/b52961_beb1e6dd2f7f41acacdbf33e8fe33b82.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4C 5036 bytes
SHA-256: 678865b6a37408f06cddc784fa859fcd158032783afcdda3946bfc4cc3a99d80
font_01_sfnt_off00005d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D90 12376 bytes
SHA-256: c755875b93c35ba1c8aeb618124925b979c8c1dfe85880d333bfe3054b7ab7b5

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