Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c0633e215be19d…

MALICIOUS

PDF

34.8 KB Created: 2020-09-21 13:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51f2cb3a8e426dd0ef134476cadd3dda SHA-1: 04fabd15ac904b324b878a4d93e95abe52203283 SHA-256: a3c0633e215be19d057d8cdf74d266183126e84a950f7380b489df253abbc699
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text suggesting it is a lure for educational materials, likely to trick users into clicking the malicious link. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt designed to lead users to malicious content.

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.me/wix?keyword=glencoe+geometry+textbook+chapter+1+answers In PDF document text
    • http://kinid.johnwesleymillercompanies.com/uploads/1/3/2/8/132814946/pamamej-ginif-netemal-gajalobubamil.pdfIn PDF document text
    • http://files.seilafernandezarconada.net/uploads/1/3/1/4/131411596/3572b.pdfIn PDF document text
    • http://files.kristinemiles.com/uploads/1/3/0/8/130873877/64af10b1d.pdfIn PDF document text
    • http://files.showmyboutique.com/uploads/1/3/1/0/131070458/zawotawoneru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e6ba451-cf4d-4469-b5fd-68966b202cf9.filesusr.com/ugd/32acb1_fb187aa2ad7e4b8ab1ec26ee82be4bd3.pdf?index=trueIn PDF document text
    • https://71d8eba5-64cf-4cde-b246-54608112b788.filesusr.com/ugd/289c5e_aadeba617ebd4d8ab26b513038907db6.pdf?index=trueIn PDF document text
    • https://25ad423c-4871-42e9-b38e-74142acb684f.filesusr.com/ugd/66f3f9_0d8c10e022ac4ab6af92a51a0d61206e.pdf?index=trueIn PDF document text
    • https://86c92ba4-1937-4685-8162-acb9ef4c300c.filesusr.com/ugd/47e66e_0a43e48f5c834f09983db2967e5f6201.pdf?index=trueIn PDF document text
    • https://e3e14cf2-3128-43bc-9048-e4418b206822.filesusr.com/ugd/c75f60_099a5797f53a41b598f21269960fac92.pdf?index=trueIn PDF document text
    • https://6e89c989-678e-48c2-8620-904f37ea01b3.filesusr.com/ugd/ab059d_6865a3fd913f4d63960068e3e1d9f821.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 4

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_off000049d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49D7 5896 bytes
SHA-256: 99318c597020d56b7d63e43dc21dba03cbf71c34a8c39f7b886ea33ef51c9db5
font_01_sfnt_off00005de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE1 9676 bytes
SHA-256: 13cbd7209e18b4780bbe41a127e922221662308e01c6371e87c39b3304b7cf2e

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