Malicious PDF — malware analysis report

Static analysis result for SHA-256 0027bb581f66497f…

MALICIOUS

PDF

47.7 KB Created: 2020-08-10 14:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfc41ccb1b70580589dbd9c50ea07ce6 SHA-1: c3e6938b31829209df091950294ca22e00088de1 SHA-256: 0027bb581f66497fa8f4b7fc1a139c0da86163cc4518d5cb639e6096bda12bee
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to an SEO redirector, specifically `https://ttraff.cc/pify?keyword=curso+de+robotica+educativa+pdf`, which is flagged as malicious. This suggests a phishing or scam attempt disguised as a free download. The ML classifier also strongly indicated maliciousness.

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=curso+de+robotica+educativa+pdf In PDF document text
    • http://files.bkyogapsychotherapy.com/uploads/1/3/1/8/131857315/4048075.pdfIn PDF document text
    • http://files.hatterasgrandslam.com/uploads/1/3/0/7/130740138/7244093.pdfIn PDF document text
    • http://files.southpacifichydroponics.com/uploads/1/3/1/3/131383949/55487a.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/1/0431/1754/3588/files/fozipepusurevinexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/all_formula_of_maths_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/cecily_amanda_m._forrell_instagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/5613/0200/files/paraphrasing_sentences_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4886/7742/files/sunoxiwekojawajujaxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/agile_project_management_for_dummies_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/jezaxusiguguvigunobufoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/1000_watt_audio_amplifier_circuit_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/activate_microsoft_office_2010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/contract_sample_between_two_parties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/bunamuguxedeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/fepipukavuvukanilopatatew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/35338231146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/81360495972.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 4

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_off000078c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C0 5224 bytes
SHA-256: c5ac05d38ee427f747e547b3dfc775a63e2cbaf65fce570b9a3cf13d7186bacc
font_01_sfnt_off00008a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A96 12012 bytes
SHA-256: 34ec9e64cad54c6ce31dfd008cb1695dcb1fc658df369b5e9465d126dc9d445a

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