Malicious PDF — malware analysis report

Static analysis result for SHA-256 a203378bd89a11ec…

MALICIOUS

PDF

45.0 KB Created: 2020-08-09 01:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0949604a9d3a1dcda111f6f248781555 SHA-1: 333b194f176003dc4a5a9b6a1a7e124cdf00c2d1 SHA-256: a203378bd89a11ecb812344bbf7175472eed1f690b5a86009c6438031b2fd492
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate tutorial downloads, but the primary link redirects to a known malicious infrastructure. The ML classifier strongly indicated maliciousness. The document body contains obfuscated text and the primary malicious URL, suggesting a lure to a phishing or malware distribution site.

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=ab+initio+tutorial+for+beginners+pdf+download In PDF document text
    • http://files.shademotorkits.com/uploads/1/3/1/0/131070792/tetobazili.pdfIn PDF document text
    • http://files.krystalgarner.com/uploads/1/3/1/8/131857315/xubepaziwawakol-vodosigumolel.pdfIn PDF document text
    • http://files.thetaoofrudy.net/uploads/1/3/0/7/130775361/375320d.pdfIn PDF document text
    • http://files.mamdouh.co/uploads/1/3/1/3/131379054/ronir-lefisasepi-zotog-xexewida.pdfIn PDF document text
    • http://files.sextonslegal.com/uploads/1/3/2/6/132682585/mepewisu_nasufeko_rawedizegi_fufori.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/1/0439/2042/5115/files/xidiwadolakidibasureda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/56983835730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/69712701213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/one_way_jesus_lyrics_and_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/95522600531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zigomotixiwututorevibalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0276/9053/files/elementary_surveying_14th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/momojedeparajem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/zuvivesedidumewojagulada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/lapikavewilaradojizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/hernandes_dias_lopes.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_off00006f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F77 5432 bytes
SHA-256: d389a36e79910115e03a90a06b91b0c2de6b8f3a048c71125d6605203f805653
font_01_sfnt_off00008208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8208 10756 bytes
SHA-256: 621d4fed06ff986ca651ba7319621cad48d5702ea79b57ea80996801c4eab935

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