Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1a605a90e2cfaf…

MALICIOUS

PDF

57.6 KB Created: 2020-08-10 21:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a95a4a2935f61202b7daed768e9ab15 SHA-1: 6f1af805e13b21471144deb3059c89cb221ab95e SHA-256: 4b1a605a90e2cfaf537b10900c88b22411e4c8b92d8ca8cff258a877bf5ad3d9
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=mechanism+of+action+antiepileptic+drugs+pdf. This suggests the document is designed to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

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=mechanism+of+action+antiepileptic+drugs+pdf In PDF document text
    • http://files.washnword.com/uploads/1/3/0/8/130874154/rafizetenuvaso_xerekawal.pdfIn PDF document text
    • http://files.indianaguitarcompany.com/uploads/1/3/1/4/131406258/9b54a8df740891.pdfIn PDF document text
    • http://potasure.chroniclesofanoverthinker.com/uploads/1/3/1/4/131453501/f5405ee3ff.pdfIn PDF document text
    • http://files.ukcitizenshipbyinvestment.com/uploads/1/3/0/7/130740298/9427040.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/1/0430/4352/0666/files/parunofumibetib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/56360710079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/mudosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0933/4683/files/automatic_door_opening_and_closing_system_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/ramonarabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/bank_clerk_exam_books_free_download_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/76814547131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/50229839784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/bejevobujawakinoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/agenda_2020_para_imprimir_gratis_portugues.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_off0000a366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA366 5572 bytes
SHA-256: 942b6c9ccc4082552343fd5affeae068aadda3e115d2bae1ee3afcda078b8f3f
font_01_sfnt_off0000b62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62B 10292 bytes
SHA-256: 49ca48b2cb1f66ef8170bc406ceb8f2917e8bd6577ad12ec7933ac81bc67d23b

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