Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b9d5e2434be93c…

MALICIOUS

PDF

44.1 KB Created: 2020-08-13 00:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad4cfccfe92e2256fb42079134696499 SHA-1: e29b9189946f06d6cdc970c9710d48c48c13bd0d SHA-256: f4b9d5e2434be93c04426f087468af2748b6cb82680a119a5b65abefdee56199
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'children's bible study lessons' and the URL for the malicious redirector, suggesting a lure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the malicious nature of the embedded link.

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=children+s+bible+study+lessons+pdf In PDF document text
    • http://files.mywytchyways.com/uploads/1/3/2/7/132712214/rolamelowomokuzikuf.pdfIn PDF document text
    • http://files.geekburning.com/uploads/1/3/0/8/130874142/134690.pdfIn PDF document text
    • http://files.dakotawilliamsgamedesign.com/uploads/1/3/1/4/131408928/2048926.pdfIn PDF document text
    • http://files.plainbird.org/uploads/1/3/1/0/131069934/vuvuf-giwamojisivibeg-moxoxa.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/1/0429/5881/5398/files/arsenico_en_el_agua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/jugupudolifamalixovevone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6572/7383/files/lei_9610_direitos_autorais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/kukuranuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/dasatemez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/vaxonalulojureme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/becker_muscular_dystrophy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/fivad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/55946479205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/2139765817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.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 7

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_off00006f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0C 5068 bytes
SHA-256: 2429c154920f81b258de2f08974200cb581fb2e5645c7bd9d93ec5367f06e475
font_01_sfnt_off0000803a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803A 10316 bytes
SHA-256: 94475f500031dde392244334656dead51a8ccf4c2c6e2e6c47f30723b70d5273

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