Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d3c7375327324b…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 13:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9804ca3c95f01ec229cd258d0c193b6e SHA-1: b25431a8d4751552dddf90bc8f2ad129c283beb2 SHA-256: a3d3c7375327324b0f1c510241170c847c53b3d37587352d5c45a972f1ce9968
194 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is likely part of this redirection chain, aiming to lure users to a malicious site under the guise of learning Italian.

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.ru/pify?keyword=apprendre+l+italien+facilement+pdf In PDF document text
    • http://files.lesleybirchartist.com/uploads/1/3/2/8/132815181/keduxadugejozij.pdfIn PDF document text
    • http://fatuzi.ivoryleaguepublishing.com/uploads/1/3/1/8/131856917/98360f5b20f8da.pdfIn PDF document text
    • http://bofoweso.xcellroofingqld.com/uploads/1/3/1/1/131164250/9697722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9541/6213/files/nevopubupefenone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/green_smoothies_for_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/recessive_epistasis_ratio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/75093908456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1043/2929/files/zar_jh_biostatistical_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7426/4996/files/waduxefifiposubuwokafuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/gisofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/jaxakodixapufufiviba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0467/3697/files/zeloso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3584/3994/files/loguxef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8758/4677/files/ketejojotekixuwule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/workplace_health_and_safety.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F52 4788 bytes
SHA-256: 08ffbfc8b2d4d421706ad81444f254aa835582db34a6ad3be9a9a9cc4d91a465
font_01_sfnt_off00006f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 11172 bytes
SHA-256: 744ffcae012ea1733ad2fa4b258063b73d5194ce61015f283c6630411ff6f3b8
font_02_sfnt_off000092b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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