Malicious PDF — malware analysis report

Static analysis result for SHA-256 26657bef36209c2e…

MALICIOUS

PDF

49.3 KB Created: 2020-09-10 13:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40980d10cf852065449d7aabebea333b SHA-1: c25d8210c1cd974c2302f17797876745b893f2d1 SHA-256: 26657bef36209c2ecb28e87c1b6bab4cc24a0a5c0fd6fc0431659a77fc67d113
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One critical heuristic, 'PDF_MALICIOUS_REDIRECTOR_LINK', indicates that these links likely lead to malicious redirector infrastructure. The document body itself is heavily obfuscated but contains a URL that matches one of the extracted links. No scripts were extracted from this sample.

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/pify?keyword=starry+night+mamamoo+album In PDF document text
    • http://losutip.livetosparkleblingboutique.com/uploads/1/3/0/8/130813077/5654652.pdfIn PDF document text
    • http://sezug.jerseyyachting.co.uk/uploads/1/3/0/7/130775677/volitopedu-pavevuvinovuwu.pdfIn PDF document text
    • http://files.scnashville.org/uploads/1/3/2/7/132740900/3109654.pdfIn PDF document text
    • http://files.staymidtown.org/uploads/1/3/1/4/131406507/pudabufuvan.pdfIn PDF document text
    • http://files.smokeyjoespipehouse.com/uploads/1/3/1/3/131383045/1d2a8eee2ceec4f.pdfIn PDF document text
    • http://files.bowerclocks.com/uploads/1/3/1/3/131382470/7872903.pdfIn PDF document text
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdfIn PDF document text
    • http://files.austlinq.com/uploads/1/3/1/8/131871704/xagulumoxelako_lemabitukusuwax_daxofibobaxano.pdfIn PDF document text
    • http://juror.isabelletullyuwhonors.com/uploads/1/3/1/4/131438265/vadululumu.pdfIn PDF document text
    • http://wufutisob.lyndahiggsphotography.com/uploads/1/3/1/6/131607321/558307.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/77d535_06d9c13a01d949c9aa0a20b59aa91fb8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dc6899_2a528deaea144751a4f1f6a28481fc55.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b9801a_60a541d1cd334b61b4c7dda0028b3f6a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/30e015_c4ba0e91ca6544828a9512b67b83e634.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/805d2a_47df7e88d66140928be955925f7ab83b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4c4e45_c7ca1386617444d1a1cece1542011cb8.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6269 8008 bytes
SHA-256: dc650997a609ba334309043633ae7f0c9bf2e76f203c5d9c9a274c0b2b64ac04
font_01_sfnt_off00007cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAE 5268 bytes
SHA-256: 142a66c0c3d1011032aba65408044c20e2567383fdfe3633bd6fb3047dd4ba14
font_02_sfnt_off00008e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E76 13304 bytes
SHA-256: b3928dda94b71c44977604ccec2b0e9ef74c26f9aef6cda6dafb586d07b5d5d0

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