Malicious PDF — malware analysis report

Static analysis result for SHA-256 e901de7ea4e58041…

MALICIOUS

PDF

71.7 KB Created: 2020-08-11 22:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a125d6b08aa507da17fc4819494d5aa SHA-1: 1943ff812d61771494591b62d5307d676e24f2dc SHA-256: e901de7ea4e58041674dc67c8c9a69c482be5700f314c4dcfead75baf0187910
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be a phishing lure directing users to malicious infrastructure.

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=estilos+de+aprendizaje+segun+autores+pdf In PDF document text
    • http://files.backyardhackers.com/uploads/1/3/0/7/130740625/jititafun.pdfIn PDF document text
    • http://files.zoevanmourik.com/uploads/1/3/1/1/131164431/gesidewirugelux-gikolo-wufiguji-xosuv.pdfIn PDF document text
    • http://files.amsalemlab.com/uploads/1/3/2/6/132696117/54f47203fdba592.pdfIn PDF document text
    • http://files.studycaribbean.com/uploads/1/3/1/3/131398117/firitadufogexag.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/1/0437/1726/3510/files/characteristics_of_management_accounting_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/28390511351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/61711481054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/73264599746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/tudifadajobozutuzalaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/pogitemixubedido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/nevifujeworalomekunimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0405/8010/files/cassandra_clare_red_scrolls_of_magic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31931154882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/centrales_trmicas_de_ciclo_combinado_teora_y_proyecto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/simple_present_tense_adverbs_of_frequency_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/87032574066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/goldman_sachs_blockchain_2020.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 6

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_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 5292 bytes
SHA-256: 87272954e1868f0e5f008787a687ed88da59c43e287dbeff21e01d8033ee435d
font_01_sfnt_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 11544 bytes
SHA-256: 7d10c7ab3e40a36b34b2c61781e20484c1f717be5b25489f399d23bce80323a1

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