Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43e6b403b973f06…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 22:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 995d661532282313b88307b433ca3468 SHA-1: bf473f9d703a0a8eebdbaa8e6f7e8eb49d7afead SHA-256: d43e6b403b973f06f37d3986a31b7a2ce48d5c01de1f449c573fa8680e33af54
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=teach+yourself+beginner+s+russian+script+pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated 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.ru/pify?keyword=teach+yourself+beginner+s+russian+script+pdf In PDF document text
    • http://files.whenham.com/uploads/1/3/0/8/130874141/fasezopinajopik_gilerawefeleten_bepab.pdfIn PDF document text
    • http://files.sgrhokc.com/uploads/1/3/1/4/131406222/443d384a2e2df.pdfIn PDF document text
    • http://files.newworldtribe.us/uploads/1/3/1/0/131070611/gerelopafefusilixo.pdfIn PDF document text
    • http://files.hughesenveng.com/uploads/1/3/1/4/131437157/pikogak.pdfIn PDF document text
    • http://walutan.pninax.com/uploads/1/3/2/3/132303382/3516928.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/1/0433/8388/1893/files/budget_highlights_2020_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1885/2264/files/37308498253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/forensic_files_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4077/6090/files/4566046082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/el_sitio_de_leningrado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/lifugagowuvavap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/4272629383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/jewilogapupafugobup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5011/4967/files/75572503659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/concept_of_triple_bottom_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/66410087175.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 5

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_off00006e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 5608 bytes
SHA-256: 62f3a6ebf801398db6fab9e0b950ce2ce2cfcc2cdcbbab959d6a65d7bc2d405d
font_01_sfnt_off000081a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A8 10256 bytes
SHA-256: e37822780b438fd374367b193a076e0aa9e97e8259323c27e105ba8abdd7bd61

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