Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9b93a19bba55fa…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 14:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 484cf96c45e32ffbb77ad059350714ec SHA-1: 50ec684b2aeb6cc25a96302ca25c050c49780ce7 SHA-256: 2d9b93a19bba55fa6495b561118e20a2a39a91a3bc016e0313907fc2ac45d2d2
194 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to learning English and the malicious URL. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger effort to distribute malicious links. The primary malicious IOC is the redirector URL.

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=best+book+to+learn+english+speaking+pdf In PDF document text
    • http://files.lisetteblanco-cerda.org/uploads/1/3/0/7/130776823/sobonefukobaxejowapo.pdfIn PDF document text
    • http://files.ef-art.net/uploads/1/3/0/8/130873790/vesori_xapemof_mabewejepebukez.pdfIn PDF document text
    • http://files.jymshd.org/uploads/1/3/1/6/131637104/womibolibumufafegod.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/1/0428/9524/5475/files/37294811977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/15531386924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/75107148412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/puzolibuxezosaxisikum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/navejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2815/8363/files/piboxoketifevat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/55740926862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/99701355939.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 5

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_off00006318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 5556 bytes
SHA-256: 27dc11a0e105c0e58855319c8a5a7566305ec4d5580e3c194a1ae423a444a13e
font_01_sfnt_off000075f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 10132 bytes
SHA-256: 35d66ad31f90e4d0b9d5f724bb113314a5800156ba3c8ad9da18d7c2e5c8c781

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