Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3d628f1ffd63b9…

MALICIOUS

PDF

44.8 KB Created: 2020-08-20 00:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 673dd3b10c3e4858a9469ec4315cfb0e SHA-1: 2dc109592046bb96ad13508e9bb123ae7f79240a SHA-256: 6c3d628f1ffd63b9fe777a8539209ccdddedbedc18799f30efebe78fbf9da5fc
194 Risk Score

Malware Insights

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

This PDF file contains a link farm and redirects users to a malicious URL, likely for phishing or malware distribution. The document body text, while appearing to be about a public service commission answer key, contains obfuscated links that lead to a redirector. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=mizoram+public+service+commission+answer+key+2015 In PDF document text
    • http://files.emmanoelleclark.com/uploads/1/3/2/7/132712006/04c9a7.pdfIn PDF document text
    • http://files.femindia.net/uploads/1/3/0/7/130775402/4677557.pdfIn PDF document text
    • http://files.themedigap.shop/uploads/1/3/1/0/131070309/4ac7f724bfe0.pdfIn PDF document text
    • http://duzir.orchestraadventures.com/uploads/1/3/0/8/130874359/b6327499.pdfIn PDF document text
    • http://bidobuxus.peterandpaulapixie.com/uploads/1/3/1/4/131454215/kuduj-lumataw-wenuxewud-bofixev.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/1/0430/3588/5725/files/tuzunavonanufopigogal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8120/files/lurokogunivarovexowijum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/22381581296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0685/9163/files/adosphere_1_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/bidarinebumojosakigape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/gobimiburuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/munuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/11218967952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/ielts_writing_task_2_answer_sheet_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/banafubujuwusewuwila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/rigatopuz.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_off00006dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD4 6040 bytes
SHA-256: 5b3fdc69f9a1b2af10e971e7a83b2206946941389c417f4710f46bfb055f4c7e
font_01_sfnt_off0000827e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827E 9796 bytes
SHA-256: 3e11df01cc779a65da73b2dc911d922392a6008e802a423aeb4c355e0bc1a040

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