Malicious PDF — malware analysis report

Static analysis result for SHA-256 879f39ae17e2ddf0…

MALICIOUS

PDF

41.2 KB Created: 2020-09-17 20:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3fb036133a1588122908e0650fe0dc0d SHA-1: 1797e2b4bebfc3f4729ade53489b316b2491f0f1 SHA-256: 879f39ae17e2ddf0122a504f4178ad539eb3f4cfef91d0a2cfa8df40365aaf83
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically a redirector at 'ttraff.club' which is associated with a keyword search for 'ccna wireless tutorial pdf'. The PDF also hosts a large number of external PDF links, many of which point to SEO-optimized link farms. The ML classifier strongly indicated maliciousness, and the presence of numerous redirector links confirms a phishing or scam attempt.

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=ccna+wireless+tutorial+pdf In PDF document text
    • http://sejutok.5starbuild.com/uploads/1/3/0/7/130775540/vaduvipeworaj_kedafibutodoxek_bebanuramoluj.pdfIn PDF document text
    • http://riziwu.summitorthosports.com/uploads/1/3/1/3/131379730/697df50df4d.pdfIn PDF document text
    • http://files.rockasmile.com/uploads/1/3/1/4/131453522/594e3dea7c94.pdfIn PDF document text
    • http://nutiva.yalestreetwc.com/uploads/1/3/1/8/131856543/nadinege.pdfIn PDF document text
    • http://files.thesaddlexchange.com/uploads/1/3/0/8/130814245/fowegubegixivuriwusu.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/1/0433/0687/7080/files/noviwuvado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/dragon_ball_abridged_android_13.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/nerineponepejapajixoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/levod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5224/2856/files/12521716069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4073/3341/files/kusoguzodilokuwa.pdfIn PDF document text
    • https://39bb3ce8-319b-474e-b20b-1a7b84b16fdc.filesusr.com/ugd/843280_cc6c944775d24b4e81eb64c3fba70a19.pdf?index=trueIn PDF document text
    • https://5291804d-64f4-4373-988f-b755d0912a97.filesusr.com/ugd/5899d5_8185b1dabe3247f4b9dbb774974b99d2.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_off0000637e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 5148 bytes
SHA-256: 3b3842555fd61f0b713b8a7820509c1ad4262bcc6be99b0c7a450795ed370f54
font_01_sfnt_off0000751e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 10256 bytes
SHA-256: 04aa81bda1bccd04c4c19594abacda9af7bd37c725c98938c6f3f7a8e62e33ee

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