Malicious PDF — malware analysis report

Static analysis result for SHA-256 16397a4bb47c23e2…

MALICIOUS

PDF

54.0 KB Created: 2020-08-23 05:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dede6475cd35d77c6fd77136ba1d53c5 SHA-1: 818bd8acabbbe396d7d1f7d86e9849c7234c4904 SHA-256: 16397a4bb47c23e269968605720cf5144b21d496a8a1eff2ca26cf396cb36c4f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The embedded URL and document body text point to a lure using 'faa far 27 pdf' to entice clicks towards the redirector. The ML classifier strongly supports the malicious verdict.

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=faa+far+27+pdf In PDF document text
    • http://lipiwekol.cospempowered.org/uploads/1/3/0/8/130814469/3955936.pdfIn PDF document text
    • http://seziti.bprising.com/uploads/1/3/1/3/131398027/fuxovib.pdfIn PDF document text
    • http://files.joelemireart.com/uploads/1/3/1/6/131607027/lurinedidirej-mikadaz.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/1/0436/9226/1529/files/85836667986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/29090115322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/piano_books_for_child_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/duxejagotaxipijesufidoseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/77852517497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/jidibezobobux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/glue_job_cloudformation_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/nabovewero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5778/2690/files/hemostasis_and_coagulation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1090/6519/files/kokiwazuzowusovorano.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 2

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_off000097eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97EB 4992 bytes
SHA-256: 10c6d1e0fd6ae70a9041c8ddcc7149fcd6af7b7d77623ed140e455a3a80be349
font_01_sfnt_off0000a907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA907 10008 bytes
SHA-256: 9e448f82f06af0a50686f9835efb9b58e1abc3ccb1dd1e9ac99c278eb1d129ff

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