Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d61d4bd8d35a7c7…

MALICIOUS

PDF

34.6 KB Created: 2020-09-17 04:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f54cba9c6e83b5cce95f72596060aaa9 SHA-1: 00f38225cd4fc55105607f09d2d876491f6aedfd SHA-256: 7d61d4bd8d35a7c72f6cfbbc49be741bb3868fbd744b3d0d81bf0100a9eeb850
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirector infrastructure and SEO link farms, indicating a malicious intent to drive traffic to potentially harmful sites. The presence of a "Kessaris watch reviews" lure in the document body suggests a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.club/wix?keyword=kessaris+watch+reviews In PDF document text
    • http://wimijo.phoenixtravelglasgow.com/uploads/1/3/2/7/132740873/7977772.pdfIn PDF document text
    • http://files.cartravelsafety.com/uploads/1/3/2/7/132741535/mosijodaw_bomodojopivefut_javuradisede_luwinite.pdfIn PDF document text
    • http://dapefa.utahstudentnurse.org/uploads/1/3/1/4/131438304/vezoziwofu-nobizobenofusu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76b16949-3664-49eb-a989-f700e9f83932.filesusr.com/ugd/10cedf_3f587ef79b80496d9bfa78e7707e6420.pdf?index=trueIn PDF document text
    • https://b30b188c-95c1-437c-83bb-e4eddaa33b22.filesusr.com/ugd/ceb2e8_c6e44a46158c4fe5b5eaa74cf5a63288.pdf?index=trueIn PDF document text
    • https://735c0868-4d45-46c4-b23a-ffd36e08e37a.filesusr.com/ugd/defcb2_4a4c32b585544342aa88be3c7ec3a259.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1140/files/juwexijanavupupuxiguji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/boxupeloriwibagolevusoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/guzufirukevoditatodirerox.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_off00004aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAF 4976 bytes
SHA-256: 5b77e53d33dd9652e0e1bb9eb757a3737c0b094408f6e607d6be6a4bf5aa7635
font_01_sfnt_off00005bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB2 10128 bytes
SHA-256: 16c52fcae07eca4772aed446d43e878e6bb5885777fd9d300c4894a7b67c777e

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