Malicious PDF — malware analysis report

Static analysis result for SHA-256 b425680258512da5…

MALICIOUS

PDF

41.2 KB Created: 2020-07-31 18:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a53e84db91e37278b7dadd5224c29b4f SHA-1: 74497604510e565662243269a750b89fcc1ef747 SHA-256: b425680258512da5035bfd9544f294caa4a3c91c3c41b7bc5c452b0125872e3a
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous links to other PDF documents hosted across various domains. One of these links directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm and a malicious redirector suggests an attempt to distribute malicious content or phish users.

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=omc+throttle+control+manual In PDF document text
    • http://files.acuqest.com/uploads/1/3/0/7/130739662/1614402.pdfIn PDF document text
    • http://files.makeshiftcoaching.com/uploads/1/3/2/6/132681976/7271237.pdfIn PDF document text
    • http://files.trr174.org/uploads/1/3/1/0/131071157/jirefeboruw.pdfIn PDF document text
    • http://files.nancyguildbendall-art.com/uploads/1/3/2/6/132681545/e6db21.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/1/0435/4398/6340/files/45190585996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/40360557734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/surojunaduzonuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/togizujuxifuvelokuxuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/sujelanarawabumopudurubid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/74713330537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2163/0631/files/2538918855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/ridesanejavaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/xofojowaripixunise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/29162940375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1501/8392/files/33058778838.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_off0000645d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645D 4888 bytes
SHA-256: 79045f0f37806fe3ea2726c2c9d333f1798f08ce9b4a645312dcf7cce6b9215f
font_01_sfnt_off000074ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CE 10344 bytes
SHA-256: d3c07359936d5b6f16d87eb831e6f8ac507af2b43325e8552303fd20edc26900

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