Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11f7b0e5e483a1e…

MALICIOUS

PDF

34.8 KB Created: 2020-08-19 00:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50d8bbccadcedb056c6aad2804de728f SHA-1: 4b14206be8579c893f6b9299a4c439d99e698349 SHA-256: a11f7b0e5e483a1e67a5650b2e7152c33cd29c098c048aa1fc2d356064f67378
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, many pointing to external PDF files hosted on various domains, including a redirector. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine ranking for malicious sites. The presence of a link to a known malicious redirector further supports this assessment.

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.cc/pify?keyword=missing+decimal+number+line+worksheet In PDF document text
    • http://lumizin.hopewithstacy.com/uploads/1/3/2/7/132712354/e394338100.pdfIn PDF document text
    • http://files.lisaperron.org/uploads/1/3/0/7/130775109/7491179.pdfIn PDF document text
    • http://tubaji.simplybeautifulpg.ca/uploads/1/3/1/4/131437792/61294.pdfIn PDF document text
    • http://files.dorzasdrivingschool.com/uploads/1/3/1/8/131871535/vupivuwofosogu.pdfIn PDF document text
    • http://files.co-created.org/uploads/1/3/1/3/131398059/kajefivozedakidasip.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/1/0428/5195/8947/files/lumeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/alimentos_antiinflamatrios_e_antioxidantes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4184/7458/files/cadiz_constitution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/jotoxotazove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/ap_chemistry_balancing_equations_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3836/6113/files/74471566654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9531/7927/files/tipos_de_valores_morales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/97006858362.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_off000049f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F2 5656 bytes
SHA-256: feeeee38c8a9c2ce87c7e8cdba275fc7aef27a51b2366860625d2750b6fbe303
font_01_sfnt_off00005d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0C 9816 bytes
SHA-256: fadc6e2f0151a2d3a90e63d2d3877648d38c44dc25e72f6f337014565c7df847

Open this report in the interactive analyzer, or submit your own file for analysis.