Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf47f6388ad8a30…

MALICIOUS

PDF

38.8 KB Created: 2020-08-12 22:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf5e50b2af333841e004e5af77579951 SHA-1: 492e22d435b8cef392d2def85206c84059bc76f7 SHA-256: aaf47f6388ad8a3016e2a4a48f81dedea38eef46df30a3e38155b60a889c63fb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to an SEO redirector infrastructure designed to lure users with promises of free downloads. The primary redirector URL is https://ttraff.cc/wb?keyword=curso%20completo%20de%20electricidad%20automotriz%20pdf, which likely leads to malicious content. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests a phishing or malware distribution attempt.

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/wb?keyword=curso%20completo%20de%20electricidad%20automotriz%20pdf In PDF document text
    • http://files.kristasharmonymusicstudio.ca/uploads/1/3/1/4/131482941/padutanele.pdfIn PDF document text
    • http://files.negleyelementarypta.com/uploads/1/3/1/3/131383630/wikuxukiledodadev.pdfIn PDF document text
    • http://files.creativeartinfo.com/uploads/1/3/1/4/131437949/6836672.pdfIn PDF document text
    • http://files.tumaytunur.com/uploads/1/3/0/9/130969389/zetamonawodadat.pdfIn PDF document text
    • http://files.bencheetham.com/uploads/1/3/1/8/131856725/vuminafaw.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/1/0429/8034/3967/files/11192353902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/82880767865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/39776597769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/zaletewalexurivepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/449703497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6241/files/anthropology_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/are_text_messages_legally_binding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/importance_of_leadership_in_community_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/avast_activation_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4627/2162/files/wakko_s_50_states_and_capitals_lyrics.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 7

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_off00005659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5659 5256 bytes
SHA-256: 0da842398a183b45b880e66dcda9c79b2ab89deaf135ef7007d843124337c4ed
font_01_sfnt_off0000682a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682A 11096 bytes
SHA-256: d222a18e18b804ac739cb145e648c9cb35a9de03cf0befb4413b97a8566e0dcc

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