Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d75c319044af66…

MALICIOUS

PDF

41.0 KB Created: 2020-09-16 23:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 261e3f6e2bab4aaeb1d6bb975ccc7fc0 SHA-1: 33571823501ae6025a066e79d312bc83a4e44797 SHA-256: f1d75c319044af66363287d5218e367727c05465aba742bb5bfc4862c3dd7138
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, flagged as a malicious redirector and a link farm. The document body, though corrupted, contains text suggesting a lure for 'free clipart' and includes the primary malicious URL. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious websites via deceptive links within the PDF.

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=free+clipart-constitution+of+the+united+states In PDF document text
    • http://fosuku.coachcousins.org/uploads/1/3/1/6/131606289/xororogenif-jebekilarunijus.pdfIn PDF document text
    • http://lutetefe.bexbourne.co.uk/uploads/1/3/2/7/132712237/f1bde4233dda491.pdfIn PDF document text
    • http://files.maycontainnotes.uk/uploads/1/3/2/6/132681452/gazawonadal_mukekujomilis_nekidukusa_sekuf.pdfIn PDF document text
    • http://files.drkaylee.us/uploads/1/3/2/8/132815882/03a2aa143bd.pdfIn PDF document text
    • http://files.teshtalk.com/uploads/1/3/0/7/130739197/zujuvulodubusel.pdfIn PDF document text
    • http://kolab.bna-stlouis.org/uploads/1/3/0/8/130814310/81071.pdfIn PDF document text
    • http://zerimija.josephbrowne.net/uploads/1/3/1/4/131483418/8ce0cbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5140/8799/files/tiwozirexukizupevusudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/fiction_beast_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/9457350217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9328/5277/files/39594235484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/perimeter_of_2d_shapes_worksheet_tes.pdfIn PDF document text
    • https://8ea4ecf4-444c-4d8d-bd47-06459c923012.filesusr.com/ugd/2f8cea_dfe4becab00b414c9176ca5822fdf843.pdf?index=trueIn PDF document text
    • https://0305c1bd-ee3c-458b-b624-6df2b3c93495.filesusr.com/ugd/b9801a_643a78201c2b4d4492c4ad663c4ddec8.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_off00006026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 5232 bytes
SHA-256: ea6088e18983bf26ddba0a6e23d16abfc27ddf37a6e235f79fb1f1819a988da4
font_01_sfnt_off000071f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F4 11344 bytes
SHA-256: 9502f9635d847b3cd5654ebbddac26c55d57ebd3ee48a7f07e3d4b65b9c1afc1

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