Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da4eaeec8c1f326…

MALICIOUS

PDF

40.6 KB Created: 2020-08-18 14:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bea6b546ea2cd9501ac631352b8675ca SHA-1: 7fd0e95908e0fc8bf5c32daba73b9796266ce95d SHA-256: 0da4eaeec8c1f326e45e38cee341f504e6a0360a869ce30ad8f45bc88e9f31da
194 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to a redirector URL (https://ttraff.cc/pify?keyword=old+bet9ja.+com) and a large number of external PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of redirector links points towards a phishing or malware distribution attempt. No scripts were extracted, but the document body and heuristics indicate a lure to malicious infrastructure.

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=old+bet9ja.+com In PDF document text
    • http://files.csunphc.com/uploads/1/3/1/8/131859993/migivuzuxoxume_finokazasizibed_disoru_sutiwugu.pdfIn PDF document text
    • http://files.sentinelshadesystems.com/uploads/1/3/0/8/130813827/c4dfe44.pdfIn PDF document text
    • http://files.lwbranding.com/uploads/1/3/1/3/131379054/sexinomat.pdfIn PDF document text
    • http://fufidub.wlcbands.com/uploads/1/3/2/6/132682892/3dfab8b.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/1/0433/0687/7080/files/22584543347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/16468208359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/gabekutox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/skaven_army_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/87817279130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/nixobopuximiwawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/candide_bernstein.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/dubavewidukalifi.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 5

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_off00005f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F76 5240 bytes
SHA-256: 3a5a56ffddb993a3d8aed48ce71b361a2a75453395b29e25113f81124b94ab81
font_01_sfnt_off0000713d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713D 10836 bytes
SHA-256: 2d85d811b8ae3bcce42d4ccb5d74092a9e9f612490585ba5039d8862ecabdc9a

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