Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a9b5fbc831337e…

MALICIOUS

PDF

55.1 KB Created: 2020-08-17 02:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1398b4578e678858d874ca5a99fd6582 SHA-1: 4c78db1eb1e667435b2f8e0669dee8a1138d97e8 SHA-256: 98a9b5fbc831337e70b688d20ff2ea7ebea54653b68a443855f9a3460022e488
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. A critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. Another critical heuristic indicates the presence of a PDF link farm, with many links pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL found in the heuristics.

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=venous+malformation+liver+mri In PDF document text
    • http://nokevamun.thetwilightbarkpet.com/uploads/1/3/2/3/132303382/1525733.pdfIn PDF document text
    • http://files.abideproductions.com/uploads/1/3/1/4/131409498/5426069.pdfIn PDF document text
    • http://files.beautytechcommunity.com/uploads/1/3/1/8/131871864/lifoxopuwa.pdfIn PDF document text
    • http://files.andrewmarikis.com/uploads/1/3/1/8/131871849/sejuwijuxuwava.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/1/0437/8699/3816/files/74133218485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/70196921599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/entrepreneurship_theory_and_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/1759556313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/12535131103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/lakidojalaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/biosocial_criminology_a_primer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/9141/5460/files/kudim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/11956688828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/symmetry_worksheets_for_grade_4.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_off00009a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A30 4936 bytes
SHA-256: e9ab4bcabdb0e241bdb93fb46c5a5a31b5814b7318c09e3112b659d9feab7061
font_01_sfnt_off0000aaec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAEC 11108 bytes
SHA-256: 3c84b37a563051c54b52ba5682028fe4a7421026f015319a4bbf7c24c5b2764e

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