Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ca6a218b5e7c32…

MALICIOUS

PDF

35.3 KB Created: 2020-08-17 04:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 13357ba8dba211faf077ecdb687b0dd2 SHA-1: 83733e163d9111b6f7857bf78fcc1697ff6eb6e3 SHA-256: 05ca6a218b5e7c3230eaa539d7bd30ad2e41be93a091b5d72c810eb2eae1e5e5
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a redirector at 'ttraff.com'. The document body mentions 'Yuri Boyka images' and includes numerous links to PDF files, suggesting a link farm or phishing lure. 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.com/pify?keyword=yuri+boyka+images In PDF document text
    • http://files.turtlebeachpc08.com/uploads/1/3/2/7/132710491/8583117.pdfIn PDF document text
    • http://zowix.kylesteffensmotorsports.com/uploads/1/3/1/0/131071073/pokumubifefajiz_jaxelodu.pdfIn PDF document text
    • http://files.redrockpilates.com.au/uploads/1/3/2/6/132681392/9255355.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/1/0436/6696/4630/files/lunofetafapedajetukajet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/pumokijizarodaruvuxeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/91362065256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/wuparalofakole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/beginner_piano_book_for_adults.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/alkali_tanah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/xuzamazapopateboxulusavob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4798/5053/files/riladi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/affidavit_of_heirship_sample_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/4274927510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0760/5918/files/54281431762.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_off00004b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4D 5240 bytes
SHA-256: 0cac1013b11b284e8079aa6ce4cc80fc6af156a28737e76ed1aa4554bf0a6f25
font_01_sfnt_off00005d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 10004 bytes
SHA-256: 26596f285c679ff7ac2ee98f4547e14af322b598109c7e6ef9f5a4de419b3013

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