Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8b0e906b05695d…

MALICIOUS

PDF

56.1 KB Created: 2020-07-31 14:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b22d043bd3b32113539e614da335aacf SHA-1: f3334feb23c2be64ac862649566814f8e386ebe7 SHA-256: 9c8b0e906b05695d3786d8a083568a983e78c3a301269b298f6beeccd842ebb5
194 Risk Score

Malware Insights

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

The PDF contains a deceptive title related to the Nigerian banking industry, likely intended to trick users into clicking malicious links. It exhibits a link farm strategy, hosting numerous PDFs on external sites, with a primary redirector identified at 'ttraff.cc'. The ML classifier strongly indicates 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=nigerian+banking+industry+overview+2020+pdf In PDF document text
    • http://files.rspfitness.com/uploads/1/3/2/6/132681201/9843275.pdfIn PDF document text
    • http://files.sixftswellspress.com/uploads/1/3/1/6/131637701/wixatezak.pdfIn PDF document text
    • http://files.woodside2-3-4hoa.org/uploads/1/3/1/6/131606206/6ffae453423.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/1/0429/1608/5923/files/60908950673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0902/files/derudojigumabalanuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/15943166430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/58271085283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/bezolon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/34169091638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7932/6103/files/juwaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/73819679531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/mulukegadejekonutexuzaras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/savelagilalup.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_off00009a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A42 5760 bytes
SHA-256: 91f7f82103d773d93ecf9f72ac5c523c1964f75ace2cb7bbcc592508624d9f3d
font_01_sfnt_off0000ae07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE07 10800 bytes
SHA-256: eaddb98fc2e391aa46b1f8e5d6749c51ce8041d2cacd769b213acd203dee28f4

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