Malicious PDF — malware analysis report

Static analysis result for SHA-256 b304a10d5bfc7a42…

MALICIOUS

PDF

66.2 KB Created: 2020-08-10 20:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2956b22b3cf2af46c0cb08a2c2c9665a SHA-1: 5ec6397ce42bdffdccb80db84e70da00e437d9df SHA-256: b304a10d5bfc7a429697e1c93a660b47ae95b552aaa345c9f034d94d855a916f
202 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a thesis and a URL that appears to be part of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The SE_DOWNLOAD_BUTTON heuristic suggests a call-to-action, reinforcing the lure. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=emotional+intelligence+and+academic+performance+thesis+pdf In PDF document text
    • http://files.mrslorenzscience.com/uploads/1/3/0/7/130775162/dedosif-bolikosoji.pdfIn PDF document text
    • http://files.stringacademy.nl/uploads/1/3/2/6/132696128/tamomibo.pdfIn PDF document text
    • http://files.livinginskokie.com/uploads/1/3/1/3/131378838/8736584.pdfIn PDF document text
    • http://files.worcestershireciba.com/uploads/1/3/0/9/130969576/vosoxekigotep.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/1/0433/9705/4631/files/23965820814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonixalekena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/xituniforifeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/jodazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3577/6408/files/tateyama_kurobe_alpine_route_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/28865964608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/xenebesotatuwalupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/anlage_av_2020_formular.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3584/1944/files/denurewugavekasuvupusigij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/93112495491.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 8

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_off0000c361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC361 5524 bytes
SHA-256: 8b86cfa22a35901bc49ea2855a399275d9b2619b8bd254b6fc5f75524edfe4af
font_01_sfnt_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 10368 bytes
SHA-256: 8fc337d6c8fc9516552c052d0fb59e677fc6c1678f4fe30e7052b11bd66c6191

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