Malicious PDF — malware analysis report

Static analysis result for SHA-256 de21be570695d5f4…

MALICIOUS

PDF

53.5 KB Created: 2020-08-20 13:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 761aa813c02b50804186987b221e8460 SHA-1: e617db5edf1247ed704acd9105e9ec86ce9185a1 SHA-256: de21be570695d5f4a72cf0a62374d95bfe6e302c2d1b27391a287ae662fcdd72
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cardiopatias+congenitas+acianogenas+pdf'. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted from this sample.

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=cardiopatias+congenitas+acianogenas+pdf In PDF document text
    • http://tebim.maitrikundalini.yoga/uploads/1/3/1/3/131381518/c8594e0.pdfIn PDF document text
    • http://files.jotsfromjill.com/uploads/1/3/1/4/131438776/1cfb7c8da.pdfIn PDF document text
    • http://boxalof.jessicaesalvatore.com/uploads/1/3/2/8/132814930/568051.pdfIn PDF document text
    • http://files.gratiotfarmersmarkets.com/uploads/1/3/1/1/131164202/zojetubokaki-pezita.pdfIn PDF document text
    • http://monojifi.paraglidingintaiwan.com/uploads/1/3/1/4/131437886/944670.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9114/8444/files/java_programming_language_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/mtg_arena_uninstalled_itself.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4674/3709/files/css_material_design_shadow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/jodejedekixatoranavamowin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/pisaruluguzud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/17939053629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/global_innovation_linkages_programme_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8393/0527/files/81857108009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/xudavuzevetozoseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/borogojidakozovobaxif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8735 5104 bytes
SHA-256: b697cd367c350361ce8d5493dc0bbee288973bea99aff72216929fd2ee55b52d
font_01_sfnt_off000098a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A0 9860 bytes
SHA-256: 9adaea7a0a1a585a5f76fc57746548301143a77d960ae0c4cff07102118c64c8
font_02_sfnt_off0000ba4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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