Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f20ee65ad600fe…

MALICIOUS

PDF

34.5 KB Created: 2020-08-19 18:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d6f676710560afc3e51a055e0a1a067a SHA-1: bcb2da9344c143dd74197ca338a8fa84bb5ac2e5 SHA-256: d3f20ee65ad600fe6d96e64b0d2b39ae137b5c8d31ad0531047c1f656111ccb9
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains multiple embedded URLs. One URL, 'https://ttraff.com/pify?keyword=flight+stability+and+automatic+control+solution+manual', is identified as a known malicious redirector. The document also exhibits characteristics of a PDF link farm, with numerous links pointing to external PDF files, suggesting a coordinated effort to distribute content or lure users to malicious sites. No scripts were extracted from this sample.

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=flight+stability+and+automatic+control+solution+manual In PDF document text
    • http://files.carolchallis.com/uploads/1/3/0/9/130968984/madofa.pdfIn PDF document text
    • http://files.mathiasmarketing.com/uploads/1/3/2/7/132740405/4586040.pdfIn PDF document text
    • http://gazada.ictatcc.com/uploads/1/3/1/3/131379858/memulidefepukaj-guxer.pdfIn PDF document text
    • http://files.augustaraptors.org/uploads/1/3/0/7/130738836/3690961.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/1/0434/3762/1404/files/lebusezobamafanasateden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/fetuwubomugoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0822/4414/files/getting_around_boston.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2235/8427/files/2500628829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/french_revolution_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/nobididutobaxerosose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/download_let_it_go_frozen_mp3.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 3

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_off000048d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D8 5548 bytes
SHA-256: 90c37d2a593a517625cb577dbb9e645685a624bbe4cf1f90c0cba01d88c89e70
font_01_sfnt_off00005b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B81 9916 bytes
SHA-256: 3451e0bd28ab104f2e024ae8a88094c1d5a42f3bedcffbea2c41ba9798c899d7

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