Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fc581566451e5e…

MALICIOUS

PDF

39.1 KB Created: 2020-09-17 04:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f936f530824a33e87cc53eec803a23a3 SHA-1: 06c5386cd427a80051c0a3ca61a9e90bc55b0c36 SHA-256: 18fc581566451e5e7917c76bc09edb7461051110afa9a4035fb12ea84702e403
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector, which is a common tactic for phishing and malware distribution. The document body, though partially corrupted, includes a URL that appears to be part of a link farm designed to drive traffic to other PDF documents hosted on disposable domains. This suggests a campaign focused on SEO manipulation to distribute 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.link/wix?keyword=how+to+undo+an+edited+photo In PDF document text
    • http://fabisab.martismemories.com/uploads/1/3/1/0/131070786/losibopipotuboneba.pdfIn PDF document text
    • http://files.newtesting.org/uploads/1/3/1/3/131383934/edc839013e7036.pdfIn PDF document text
    • http://files.mikesmassivemissives.com/uploads/1/3/0/9/130968934/rotozitazasi.pdfIn PDF document text
    • http://files.huffmanshomestead.com/uploads/1/3/2/8/132814166/5774505.pdfIn PDF document text
    • http://fenefo.onecfi.com/uploads/1/3/2/6/132695471/3563123.pdfIn PDF document text
    • http://files.scottishyouthballetgrandprix.com/uploads/1/3/1/3/131398308/2398215.pdfIn PDF document text
    • http://files.antoniocoach.com/uploads/1/3/1/8/131856539/4cd72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bfad91d1-31b9-492d-984e-e609035e4910.filesusr.com/ugd/8b2c09_64f186ee1ad341649543a943f64f7bb0.pdf?index=trueIn PDF document text
    • https://59395220-0c4a-47f0-b7ac-b3fe716bee68.filesusr.com/ugd/81d6a4_35363980123b43f2bb335a8b9a397d00.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/25686225985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/84037374013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5911/7222/files/sikazaguvebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/turamixuzinivegepasezosad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/43047209315.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D50 4792 bytes
SHA-256: 6e9d7c0d202afe50ef5222be3de600c3bb3a62b0b28552cc808ddc76c5ddbcc8
font_01_sfnt_off00006daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 10032 bytes
SHA-256: d249db04432706d209f13ad39047b942928ef6b987ea64d5c9b9ce8163580309

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