Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8aabe5507c39551…

MALICIOUS

PDF

46.8 KB Created: 2020-07-28 08:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0dde8444669d4ed6e5595324d24929c SHA-1: c021148f35302dc3ee4d6427be3be1fe3b49f2b4 SHA-256: d8aabe5507c3955176a4ac9f993abe7ce1b27be8181ae86bd86b599685c5643c
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to educational content. The presence of a link farm and a high ML classifier score further indicate malicious intent.

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=atoms+elements+and+compounds+worksheet+ks2 In PDF document text
    • http://files.kathrynyancey.com/uploads/1/3/1/4/131409693/wofiwex.pdfIn PDF document text
    • http://files.elkdalebaptist.com/uploads/1/3/2/3/132303175/towotazalikulof_fugoximoli.pdfIn PDF document text
    • http://files.missdavisluellalions.com/uploads/1/3/0/7/130739401/4dc70e0ef9.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/1/0439/2534/0328/files/tabupuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/48649622354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/jaronid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/jutunawovuwimopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1413/4692/files/sivuvino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/35392912493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9942/2871/files/15683604163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/vetadadawaxomonaxakifafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/bopafarexulofete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/86773022156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/zalizepezadibukubalera.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 5424 bytes
SHA-256: 5d89aff70c7eae0658608332598dda98e10abe3c6fa9a74f8c81dd616ac8a06b
font_01_sfnt_off000076f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F5 9884 bytes
SHA-256: 47c7319520539888ca145b41edef5f7597f0dac6839a6b43386e5a95b0d0be62
font_02_sfnt_off000098dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98DC 16088 bytes
SHA-256: ba49a359edda73fb432b2118eee43e8681603f6c6f845ef214af08c3a95321db

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