Malicious PDF — malware analysis report

Static analysis result for SHA-256 f279ac8290db93ab…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 11:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1528102616115b96e036120ed3454f55 SHA-1: 94611152eefe995afadd014d9cadb94dd319421e SHA-256: f279ac8290db93ab7a66770048d37b074408ca2fbc0e2586f17a048ef962c882
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body itself contains obfuscated text and multiple links, including one that points to a Shopify domain, suggesting a link farm or content delivery network used to host further malicious payloads. The ML classifier strongly indicated maliciousness.

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=auditor%25C3%25ADa+de+los+sistemas+de+informaci%25C3%25B3n In PDF document text
    • http://files.redirectnews.com/uploads/1/3/1/6/131606069/ff780e5.pdfIn PDF document text
    • http://fexelo.catinc.org/uploads/1/3/2/6/132681445/90fa8fc8af02.pdfIn PDF document text
    • http://files.stephaniebien.com/uploads/1/3/1/6/131637016/25b0383a87630e.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/1/0431/3802/3586/files/jegumafepizijepoduzewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8924/8663/files/sourcemod_1._9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0956/3035/files/86813560341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijufetibumumupaxewaromuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/nupiwuvepidedonoxegosako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5578/7681/files/habanera_carmen_coro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2565/2117/files/25648978197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/vobutup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6155/3825/files/kjv_bible_for_mac_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/73732947157.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_off00005ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA3 5348 bytes
SHA-256: 1d70f3f7caeec499094ea02dd4c51f351e85d63b6c241ea1b6829ef7e0694344
font_01_sfnt_off00006e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E74 11120 bytes
SHA-256: ffb75c4d7eae26a0e986b7b0cb0328ade7583ff37f1e2827dcd965ec7ec9bba5

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