Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f620eb171d3dd51…

MALICIOUS

PDF

41.7 KB Created: 2020-08-26 08:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca92b06acfc22d3ebe4840ff02ae116e SHA-1: 71d588c47e26a668c59440fcbfbd4b5add120e5a SHA-256: 4f620eb171d3dd5137c3102cb4a79f5b2369946c375f1994b4ccae3bffae537a
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.club/pify?keyword=naruto+hates+sakura+fanfiction', which is likely used to funnel users to a malicious site. Another embedded URL, 'https://cdn.shopify.com/s/files/1/0437/2742/1608/files/rupematevazudeviwi.pdf', is part of a link farm. The ML classifier also strongly indicated 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.club/pify?keyword=naruto+hates+sakura+fanfiction In PDF document text
    • http://files.sebasclofsky.com/uploads/1/3/0/7/130738892/1f6f14f54d960a.pdfIn PDF document text
    • http://files.badgirls.hu/uploads/1/3/1/3/131380849/ledime-medotidovo-mediku.pdfIn PDF document text
    • http://files.jamesdonlon.com/uploads/1/3/2/6/132682542/15e733b0.pdfIn PDF document text
    • http://files.thesocialdvm.com/uploads/1/3/2/6/132695668/wozugilapes.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/1/0437/2742/1608/files/rupematevazudeviwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/5953635356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8592/9375/files/kutavijikazik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7045/5957/files/danukesidavevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/70525910730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5079/3122/files/ciao_adios_pagalworld.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2348/2535/files/javascript_tutorial_point_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/understanding_pharmaceutical_quality_by_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/ligixeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/the_copernican_revolution_kuhn.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 6

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_off000067d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D1 4968 bytes
SHA-256: 4eb4c94e4bc982de67fd0effac360df8e2b5caa4cbfefe1d0fdd9087507f22d9
font_01_sfnt_off000078b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B6 9872 bytes
SHA-256: 80d4d7b82fc9672438ef0c5cf4eef2bd4a029970c3cb288d7f1f176cdfc52fe5

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