Malicious PDF — malware analysis report

Static analysis result for SHA-256 42511f9ac00c0597…

MALICIOUS

PDF

45.9 KB Created: 2020-08-12 00:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 758fcc0d688f181b466519262cd6f42a SHA-1: 16228a8e7a815df941c9c9d4ed7496ad9f5a50bb SHA-256: 42511f9ac00c05974e9ad759770cf4c39117d60118202467c273ae59b904a1e5
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=caperucita+roja+y+el+lobo+feroz+cuento+pdf', is flagged as a malicious redirector. The document's content, though obfuscated, appears to be a lure related to a children's story, likely intended to trick users into clicking the malicious links.

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=caperucita+roja+y+el+lobo+feroz+cuento+pdf In PDF document text
    • http://files.fitness-slayers.com/uploads/1/3/0/7/130776591/3333096.pdfIn PDF document text
    • http://files.raj108yoga.com/uploads/1/3/0/8/130813042/pajupu.pdfIn PDF document text
    • http://files.caldermpasociety.com/uploads/1/3/0/7/130775462/7f29676019f4a.pdfIn PDF document text
    • http://files.scottish-eire-farms.com/uploads/1/3/1/3/131381374/setijen.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/1/0433/5121/2200/files/nijasagewevoposiwakasos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/ssc_blank_answer_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/24152117116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/timex_wr_50m_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/68649664990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/41756987947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/tauren_druid_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/98032534273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/15030829266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/how_to_disassemble.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/tenozakotokifebeto.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 4

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_off0000729f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 5244 bytes
SHA-256: 148f95fee59024353885cab1ed583ab93ccdd1806b7ee83066bb025e4059ef55
font_01_sfnt_off00008497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8497 11240 bytes
SHA-256: eb5b75dc7f1c72150d60fb07359708ecffed90379dcc63cd84dd1f4f23503b1c

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