Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf8eb3959fd7cc3…

MALICIOUS

PDF

48.6 KB Created: 2020-08-24 00:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fda85ccea07dc27cd4cd7285d96f14a5 SHA-1: a8d4c40d7f4fbe038453fb17947c8ab3742e4c00 SHA-256: 6cf8eb3959fd7cc38de209ed8c688243a60f100a46f868d0316ab7cded8be8a0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or phishing attempt. The primary redirector URL, 'https://ttraff.com/pify?keyword=umbrella+academy+comic+book+pdf', is flagged as malicious. This suggests the document is designed to trick users into downloading further content or visiting malicious sites under the guise of providing access to a comic book PDF.

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.com/pify?keyword=umbrella+academy+comic+book+pdf In PDF document text
    • http://files.cltreecare.co.uk/uploads/1/3/1/4/131452922/578a3957b5.pdfIn PDF document text
    • http://files.kennetheugenepeters.com/uploads/1/3/0/8/130874400/6959958.pdfIn PDF document text
    • http://files.surestrikesoccer.com/uploads/1/3/1/4/131409761/wegemepiduki-ledizajen.pdfIn PDF document text
    • http://melafumu.jakesimplements.com/uploads/1/3/0/8/130874278/6261388.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/1/0429/5491/6003/files/understanding_business_11th_edition_mcgraw_hill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/buvowotiragafanodovet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/korean_alphabet_pronunciation_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/43117646549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/hot_dog_buns_nutritional_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/catfish_farming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1573/2381/files/vazazidajufulogogoxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1787/0239/files/48205505941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/kopagitumagupugezaxavet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.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 7

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_off00007d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D94 5420 bytes
SHA-256: f6c8b8ba65127fe4c75712881f6223a2483dc56b7415fcbfa304fcabce6ac464
font_01_sfnt_off00008fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEA 11216 bytes
SHA-256: c916f1f59aab33980a0ee80b7843a35d4cba8efe29d5fff4ffedf1cafa1785b2

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