Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab25f0973897b128…

MALICIOUS

PDF

53.4 KB Created: 2020-08-25 11:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d604f66c160155f67bfa6afdf05bd4ff SHA-1: 2bec320522a7489d52b01a9ccf1fced095770379 SHA-256: ab25f0973897b128bec73a215eeafca393e34c31c7c953f6abdf275650453486
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=analisi+logica+pdf+esercizi', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Analisi logica pdf esercizi' and the malicious URL, suggesting a lure to educational content that redirects to a malicious site. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of a link farm to improve SEO for malicious content.

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=analisi+logica+pdf+esercizi In PDF document text
    • http://files.region4convention.org/uploads/1/3/1/4/131454098/2305997.pdfIn PDF document text
    • http://files.wausauspokeeasy.com/uploads/1/3/2/7/132710726/15729dd0.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/1/0429/7441/2949/files/adverbs_of_frequency_intermediate_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/31480142687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6451/5994/files/conversion_of_cartesian_coordinates_to_polar_coordinates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4041/5644/files/down_syndrome_karyotype.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3207/3624/files/gakuxafibiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/breast_cancer_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/wojugabasokepivofesixom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/bupidilinorer.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_off00009024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9024 5364 bytes
SHA-256: 27c169c3a91fdc616268a257a19193cf0a3e7bf202edbb373a2a0ee7993ec437
font_01_sfnt_off0000a274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA274 11356 bytes
SHA-256: 15339150c8777b0de6af017bcbaa088e7c210cb606396a596e094e031ffe4160

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