Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab72f661f0ed09d…

MALICIOUS

PDF

42.2 KB Created: 2020-08-07 17:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14a42edc2a8c231d0387be21ee4976b4 SHA-1: 91175a49b5233a89dcb8535cd01feab9f93fd936 SHA-256: 5ab72f661f0ed09d678206e4b5fb0f300d08986153c2c6f9e24aa509ee4515b4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as legitimate downloads, but the primary link redirects to a known malicious redirector. The ML classifier strongly indicates maliciousness, and the PDF structure itself is flagged for containing numerous external links, suggesting a SEO-based lure. The document body contains obfuscated text and URLs, reinforcing the phishing attempt.

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=airline+feasibility+study+business+plan+pdf In PDF document text
    • http://files.wittenbergchapel.com/uploads/1/3/2/6/132682585/5104108.pdfIn PDF document text
    • http://files.sabahhomestaykualapenyu.com/uploads/1/3/1/4/131453288/semumotena-busosovesi.pdfIn PDF document text
    • http://files.downhomediner.net/uploads/1/3/0/7/130775845/nanazufideju-botilom.pdfIn PDF document text
    • http://files.nashvillebodyworks.com/uploads/1/3/1/4/131408103/4872958.pdfIn PDF document text
    • http://files.norfolkcatss.co.uk/uploads/1/3/0/8/130814717/1086761.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/1/0429/1048/2591/files/runescape_family_crest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/dexeretelozubevelanaliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4940/files/biology_objective_questions_and_answers_for_competitive_exams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sedafasejizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/xukitirezofaxaderuduzukeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/madetokoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/megebosogepozunakiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/budizaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/vorapilasaxidi.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_off00006668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 5264 bytes
SHA-256: 16c3472d7497f22cd179f81c19f26eafdf71462f0dcb23377aebf0bab2abc7f5
font_01_sfnt_off00007862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7862 10400 bytes
SHA-256: 80f74149d7592852551cd23b713c9a337ed9dbb5eafd9fa6b5b1ea4705578b5c

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