Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10bd527c508d397…

MALICIOUS

PDF

38.4 KB Created: 2020-08-12 08:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e2334eb36a9ee57fa8a436a4b663024f SHA-1: 3dc528f67370ae61f17c34b3c33b63a18fe854d5 SHA-256: a10bd527c508d39716497bef8a9c27b62e337e6a2bf001f1e8551e1a66b2cc48
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as https://ttraff.ru/pify?keyword=diccionario+biblico+completo+gratis+pdf. This indicates a social engineering attempt to drive traffic to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF.

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=diccionario+biblico+completo+gratis+pdf In PDF document text
    • http://files.graceinwellsville.com/uploads/1/3/0/9/130969917/6286939.pdfIn PDF document text
    • http://files.northshoremandarin.com/uploads/1/3/0/7/130740325/kawariz.pdfIn PDF document text
    • http://files.capturingmilliseconds.com/uploads/1/3/1/6/131606465/mimowawukuk.pdfIn PDF document text
    • http://wixofo.mcnamarakenney.net/uploads/1/3/1/4/131452883/mumigawiv-tupebe-buganoxu.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/1/0434/9113/1554/files/41998262454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/pathophysiology_of_peptic_ulcer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/zedevijin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/19000524282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1818/9980/files/xebowudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/43787985772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/94369756208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/sogemewimapesavobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/appropriate_technology.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_off00005313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5313 5612 bytes
SHA-256: a214d2df987867de784b14a405befbe080cce628b93a2542caf3be38748e1d1b
font_01_sfnt_off0000660a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660A 11312 bytes
SHA-256: 4fd4e8f0f30101e41c90a4ebcc1df17f6855b8406cd831973afcd0adfaf65332

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