Malicious PDF — malware analysis report

Static analysis result for SHA-256 043fc77d798016bc…

MALICIOUS

PDF

40.5 KB Created: 2020-09-21 01:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab0b500119f8b4576cc5c2f86c51e41e SHA-1: c92e74150c1bca7138c503c7ec47aeb5fa6bf212 SHA-256: 043fc77d798016bc6ae4f89740e32b4e8668659875de9fb691f082db9aadda9d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many pointing to disposable domains, designed to lead users to external content. One of these links, 'https://ttraff.link/wix?keyword=work+calculations+worksheet+answer+key', is identified as a malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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://ttraff.link/wix?keyword=work+calculations+worksheet+answer+key In PDF document text
    • http://lajivelap.artebom.com/uploads/1/3/2/6/132696067/3972911.pdfIn PDF document text
    • http://files.kineticleagues.com/uploads/1/3/2/6/132695633/foguguja_liwif.pdfIn PDF document text
    • http://files.chlaudit.com/uploads/1/3/1/4/131437474/lugodelax-rawolobusore-rusinonolemumev-vonaforu.pdfIn PDF document text
    • http://files.mirelajoja.com/uploads/1/3/1/4/131454207/43d0ccbfa6a.pdfIn PDF document text
    • http://files.mrsjonescoldbrew.com/uploads/1/3/1/8/131860125/zizipos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cbabcf4e-f869-46ab-b623-791886c425c1.filesusr.com/ugd/595093_0d11a334b4124ff6aa31f58956b3c806.pdf?index=trueIn PDF document text
    • https://b6c692ae-a0a5-4f4b-8336-5853969cc8f9.filesusr.com/ugd/3bf302_e6b3d63565b94589b26d10d137d0dc2d.pdf?index=trueIn PDF document text
    • https://96a4d579-2da6-4ab9-b8d0-f698dccb18e8.filesusr.com/ugd/5926b4_22e84ba26c7d480aba7ee889cb553b7c.pdf?index=trueIn PDF document text
    • https://abddeace-f8ba-4a23-829d-9c8d6da9aa2d.filesusr.com/ugd/40b9e6_9cc658d1ab124141ba9c6f04477c42b4.pdf?index=trueIn PDF document text
    • https://68b85305-55fe-4fe1-8996-6fd30aa34f6a.filesusr.com/ugd/f6a907_435ee2557e074ab9973cb3b2316d00c4.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_off00005ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFD 5156 bytes
SHA-256: 6594f85833dc5d57155c88c2e8964a27b642d2d5aabf51445e9662a897cceb58
font_01_sfnt_off0000719f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 10460 bytes
SHA-256: 98f372786134558bcfe63b84260222f63938c7a384492d788451c4b7e660ed27

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