Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecba4e17f592bde1…

MALICIOUS

PDF

35.2 KB Created: 2020-08-12 00:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf262d07ba013dd77ec827bf80d015e0 SHA-1: e94e058b28eb89c1289570e81dce7f69e7672e89 SHA-256: ecba4e17f592bde1d80ee7df391aada696379bf3aad7c293e931169f201e8963
194 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to create a link farm, with a primary redirector pointing to malicious infrastructure. The document body, though obfuscated, contains the target URL 'https://ttraff.cc/pify?keyword=treatment+of+hepatitis+c+virus+pdf', suggesting a phishing or scam attempt disguised as a free download. The ML classifier 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=treatment+of+hepatitis+c+virus+pdf In PDF document text
    • http://files.jennifernocktrainingandconsultancy.com/uploads/1/3/1/4/131455543/7678308b1a9f.pdfIn PDF document text
    • http://files.peacecitysoaps.com/uploads/1/3/1/4/131453288/5724583326bb59c.pdfIn PDF document text
    • http://lamivat.albemarleallotments.org.uk/uploads/1/3/0/8/130813612/02015ad35363515.pdfIn PDF document text
    • http://files.hopeforhispaniola.org/uploads/1/3/0/7/130739024/956a5.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/1/0437/6346/6391/files/30185316679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7482/7941/files/altivar_312_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/the_complete_dlab_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0899/1143/files/shake_hands_with_the_devil_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/vaborekazufonisotob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/pandas_select_row_by_index.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5466/9729/files/juzukaxamufuletozorej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/50207523664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/cctv_camera_price_list_in_delhi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3686/8762/files/mupugimeluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/9330300273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/vonitebewadavakon.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_off00004b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6A 5372 bytes
SHA-256: 6de2cc2006028b13b6a7fc7dbac510f249a2413baba2c059fc032d51916580c1
font_01_sfnt_off00005d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 10056 bytes
SHA-256: f6425c7d47dc19c482f37f511aa78b4d63b40459dc97d0fd87dce6db483a5465

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