Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af98b1609aff8a0…

MALICIOUS

PDF

41.8 KB Created: 2020-08-12 02:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 635d48ff78d05055e702867d23188fcb SHA-1: d89b977feb98137b58f21a3ceabfebd4c72d2619 SHA-256: 9af98b1609aff8a07e1b564d7f666fa2c0c795b434e1afcee020cf2afea23a91
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 for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious redirector infrastructure. The document body and embedded links suggest a lure for free PDF downloads, specifically mentioning 'Curso de espanhol para iniciantes pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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.ru/pify?keyword=curso+de+espanhol+para+iniciantes+pdf In PDF document text
    • http://files.illuminolightingco.com/uploads/1/3/2/6/132683165/xawijakufuvofikara.pdfIn PDF document text
    • http://files.leslienagel.com/uploads/1/3/1/4/131437012/dukavagexovuj-fofofux-moneziw-vikefad.pdfIn PDF document text
    • http://nuxizabu.mightyfortressinspections.com/uploads/1/3/0/8/130813108/f40b4a08c89c9.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/1/0434/2261/3669/files/xukupenipazat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/pamomeputufarifapunadidan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/create_new_branch_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1859/9075/files/cfop_method_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/algebra_ebook_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4072/2331/files/anthropogenic_pollution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8922/2045/files/gobupisizara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/eye_text_symbol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/gufunokutitaniwipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/dwarf_fortress_melt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/3369/5132/files/add_watermark_to_foxit_reader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9309/6600/files/tozizuligufizadigaxesap.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 3

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_off00006164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 5148 bytes
SHA-256: 1ee976b4b8276e730899e34cbaf06048d9ad0bc75e80f9958cdccfce728ff444
font_01_sfnt_off000072d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D6 12616 bytes
SHA-256: a6aa80098e2fd00f4777f3103ba32a3599792023154050ac435a722dc7756528

Open this report in the interactive analyzer, or submit your own file for analysis.