Malicious PDF — malware analysis report

Static analysis result for SHA-256 9554f3692c003b4f…

MALICIOUS

PDF

67.0 KB Created: 2020-07-29 20:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16a0eddd9ea7f3096eb0db95f1e903d1 SHA-1: 3f2822c990027e3974281f7a529d53b323461d13 SHA-256: 9554f3692c003b4f3cd4a7069bdc335a2ad0f90cd052afa34ee45d0b8d04651c
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple URLs pointing to potentially malicious redirectors. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests it is intended to lure users with a topic like 'Software architectural styles pdf'. The primary malicious IOC is the redirector URL.

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=software+architectural+styles+pdf In PDF document text
    • http://files.isth2019.org/uploads/1/3/2/6/132680831/2579704.pdfIn PDF document text
    • http://files.unconditionalloveministries.com/uploads/1/3/2/6/132695698/8330450.pdfIn PDF document text
    • http://files.leopoldwritingprogram.org/uploads/1/3/1/1/131163833/virajij_mesuripe_rosonuluzokanig_wukujufelovugiw.pdfIn PDF document text
    • http://files.davidtaylorphotographer.com/uploads/1/3/0/7/130776246/6982911.pdfIn PDF document text
    • http://files.humeirakazmi.com/uploads/1/3/0/7/130738794/ginujo.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/1/0433/0510/7620/files/dopebamozenozux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/zoduwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9744/7831/files/zofalumituviderofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/96923736223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/dalojizafogetavinadidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9902/9655/files/78446185507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/datefemadojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/sesegop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.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 4

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_off0000c8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A4 5316 bytes
SHA-256: a0af62240955dd84ab6db96397c38730d8e208d3693dae57925dc1cbc0477b86
font_01_sfnt_off0000dade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADE 10608 bytes
SHA-256: df7f499b668f03fb1bfb12f360a4b0d28093ebd7efd4b2f9c19cf565da9027c7

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