Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3579e4c73b430b9…

MALICIOUS

PDF

45.7 KB Created: 2020-08-12 21:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8ef1c9b3cde92b96588aba7f2ac9445 SHA-1: 99b9d08f9f88a78ff6949b4a4c292e11a4cf34e2 SHA-256: f3579e4c73b430b9e6799cad3e5667440ea1bf4d0c1d2a0cd0359abf5e018459
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs, a common tactic for SEO poisoning and link farming. One of these links, "https://ttraff.com/pify?keyword=basics+of+model+aircraft+design+pdf", is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references "wkhtmltopdf", suggesting it was generated programmatically to host these links. The primary attack pattern involves luring users to a malicious redirector.

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=basics+of+model+aircraft+design+pdf In PDF document text
    • http://ligojate.arkiteka.com.au/uploads/1/3/1/3/131384169/2214794.pdfIn PDF document text
    • http://sipit.worldofsong.com/uploads/1/3/1/4/131453850/sejevusemusopuk.pdfIn PDF document text
    • http://files.youthmariachi.com/uploads/1/3/2/3/132303175/27b1b4.pdfIn PDF document text
    • http://files.busterscinematicuniverse.com/uploads/1/3/1/4/131437330/5ad14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/84487079960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/90610010565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/99332439192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/certificate_of_compliance_electrical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/6635/3814/files/soda_10_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/ages_and_stages_questionnaire_42_months.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/odisha_b._ed_question_paper_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/learn_german_grammar_a1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0549/9801/files/jigabedozivop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DE 5312 bytes
SHA-256: 6d28fd752f58a5ccc8e04bd5a143a717ee716f610929008db606228a818704bb
font_01_sfnt_off000079c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C7 10052 bytes
SHA-256: 4422258b11d2bf704067e7467d7072c6c957046251bfab681b624e58a9990478
font_02_sfnt_off00009bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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