Malicious PDF — malware analysis report

Static analysis result for SHA-256 716925dc95b8e0f4…

MALICIOUS

PDF

76.0 KB Created: 2020-08-18 15:38:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6baa26560eb5be054f7736d4a21acb7b SHA-1: 75d72e7eb8de25418354af30b58c06cf5f2b2929 SHA-256: 716925dc95b8e0f48570963af60808514ceba97cc3d33b12d6cbf4aaa7d88475
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to redirector infrastructure, specifically identified as a malicious redirector by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs, suggesting a phishing or scam attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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=basic+statistical+tests+pdf In PDF document text
    • http://files.amandabeekhuizen.com/uploads/1/3/0/7/130775690/d5ff23774ec07bf.pdfIn PDF document text
    • http://files.penncrestlions.com/uploads/1/3/1/4/131454106/7272726.pdfIn PDF document text
    • http://files.atxgreenawards.org/uploads/1/3/1/0/131069899/1a7a19d86c08.pdfIn PDF document text
    • http://files.dahliaspourhouse.com/uploads/1/3/2/3/132302859/sevipinusutimir-xinimaxiz-jifipat.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/1/0433/1523/2923/files/63761938856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/ukulele_fingerpicking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/six_ideas_that_shaped_physics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3727/6825/files/5797156726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/appsc_group_2_previous_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/lobubozosuturesizeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/38501881101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/86105184650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/pathogenesis_of_hepatitis_b_virus_infection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/buxuwudoxidoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/nalofevo.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_off0000e1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CF 5100 bytes
SHA-256: a24ff597ccf42a3cedc9d3e95d15537227beb8e345507d2bea10386f9e8009fd
font_01_sfnt_off0000f331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF331 15308 bytes
SHA-256: bcbd85b969d6e385caf0bce91d008269bb10ee1f05013507d39dfaf205475d25

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