Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef0c3ab4ab4947e…

MALICIOUS

PDF

48.6 KB Created: 2020-08-22 02:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 713f9ec1be065369b6f6a722a504225f SHA-1: 7fb63cb4d4f291dc4c2d391a5ae87bfb97d21b4a SHA-256: cef0c3ab4ab4947eaaf0a874fd6eb58af74364f18bc8cc6a4f717d21a089a240
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to 'Boat browser pro apk latest' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.com/pify?keyword=boat+browser+pro+apk+latest In PDF document text
    • http://files.enactusguelph.ca/uploads/1/3/1/4/131453226/sovamaf.pdfIn PDF document text
    • http://files.firebirdnewzeal.org/uploads/1/3/1/3/131379498/towidamatulo_pukenevej_vixemimer.pdfIn PDF document text
    • http://suzesujaw.alexcartana.tv/uploads/1/3/1/4/131437423/minasesage_vuxenawebe.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/1/0446/9476/5724/files/82614495022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/67459889191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/68898908376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/time_distance_speed_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/anakin_midichlorian_count.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2357/8774/files/56161581759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0293/files/meaning_of_language_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/multiple_sclerosis_treatment_guidelines_europe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/liberation_war_of_bangladesh_1971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/40236663368.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_off00007f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F90 5160 bytes
SHA-256: 9e04fa21291e46fbeebe73fc7d955cc237c54d00fc7e4b3831b9c77e76b4a11e
font_01_sfnt_off0000913c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913C 10916 bytes
SHA-256: 5542aef23bf1432d9532ba2b6fbeb6ddf650d4af3eae4b99a9103e21cb995dd1

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