Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15925330006fdad…

MALICIOUS

PDF

77.0 KB Created: 2020-07-30 11:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1003c560dafe7c4090df1807d1bcbc18 SHA-1: ab70d36c5d00a68846c337058f30631f9b9ca023 SHA-256: a15925330006fdaddebf5a6f1596002c8e7d81203e5ed7419ac819af7c0a5f06
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=guia+ada+2020+espa%25C3%25B1ol+pdf+resumen'. Another heuristic identified a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or traffic redirection. 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.cc/pify?keyword=guia+ada+2020+espa%25C3%25B1ol+pdf+resumen In PDF document text
    • http://files.theessentialoilsmethod.com/uploads/1/3/0/7/130738722/tufunuvumafirekowo.pdfIn PDF document text
    • http://files.counsellingpsychologist.services/uploads/1/3/0/9/130969555/7582248.pdfIn PDF document text
    • http://files.ksobha.com/uploads/1/3/1/4/131453214/lugukitola-legepuso-nunux.pdfIn PDF document text
    • http://files.kenneljikinokensha.com/uploads/1/3/2/6/132695531/pirijun.pdfIn PDF document text
    • http://files.restauranthexagone.com/uploads/1/3/1/8/131856072/1970610.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/1/0428/9835/8432/files/figarawevig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7143/7984/files/mibatakisujisez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/75084404240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/39150093352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4029/3543/files/gunajewodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/bizowajuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8769/files/jezibugabuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2167/2341/files/zonemenozevuxemeruxibobox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/32054867176.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_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 5504 bytes
SHA-256: 37eb6c97e0a6d1a4562b8050ca47451d17e78926e6398c59f627f00cd5e68c02
font_01_sfnt_off0001015d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 10272 bytes
SHA-256: 733f82f1a3b940fcd17e14bdc774b6be5c3fb93bc53bb971e8d3ed680f4893bb

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