Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5dda7197354ac4f…

MALICIOUS

PDF

48.1 KB Created: 2020-08-11 21:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00971fc4b409c826f710b1e82444ce9e SHA-1: c97eb95cae92345f99041e7d8d1d3f1484147ae2 SHA-256: c5dda7197354ac4fa4d6c470d14f67b6004997a22db86909672ab512d8555578
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 of these links, 'https://ttraff.ru/wb?keyword=the%20canterbury%20tales%20full%20text%20modern%20english%20pdf', is flagged as a malicious redirector. The document body, though heavily corrupted, appears to contain references to 'wkhtmltopdf' and the Canterbury Tales, suggesting a lure to disguise the malicious link farm. The presence of numerous links to external PDFs, including potentially malicious ones, indicates an attempt to redirect users to harmful content.

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/wb?keyword=the%20canterbury%20tales%20full%20text%20modern%20english%20pdf In PDF document text
    • http://tanirala.huntervalleydressage.com/uploads/1/3/0/9/130969744/11b6dcbdd.pdfIn PDF document text
    • http://miruxo.dressartnyc.com/uploads/1/3/1/8/131856158/gajidulalorerax-garebog-xojukusaxuful-zebokopon.pdfIn PDF document text
    • http://files.yoshikoarahata.com/uploads/1/3/2/7/132740905/kobikukugo_pilew_samedinite.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/1/0429/0645/2127/files/arsenic_and_old_lace_full_play_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8955/8680/files/tinifujaxaratesuzenav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/jegozitanosetofopijiwulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5765/9560/files/numpy_split_array_into_chunks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/anemia_ferropenica_en_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6330/files/mubelenuwesikodowiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/setixituruba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/boston_bruins_printable_schedule_2020_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/95136698106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/how_to_hack_someones_text_messages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/backwards_and_forwards.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 1

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_off00007b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B77 5828 bytes
SHA-256: ead7fb7133b47074bd0b2174a03df33d0c4ffc150ea70ea0d3aecd22e4f2e564
font_01_sfnt_off00008f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F29 10732 bytes
SHA-256: ea17e0a0b67519ab46d4949042847152be456c1ffc450459ae33740c2c764ed5

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