Malicious PDF — malware analysis report

Static analysis result for SHA-256 654c15967306cad7…

MALICIOUS

PDF

43.4 KB Created: 2020-08-04 20:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 311a105a7346fff79da23bf5a694eddf SHA-1: acda5b09c5f0a959429338fa8505cdc571a795ed SHA-256: 654c15967306cad772d1414cce5fccb5b3aab8f75e8512094a25c7ac724cc71a
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate downloads, but they redirect to a malicious domain. The document body and heuristics indicate a lure for free content, likely to deliver a payload. The presence of multiple embedded URLs and the ML classifier's high confidence score support this assessment.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=prentice+hall+biology+textbook+pdf+answer+key In PDF document text
    • http://files.cybersecurityinc.net/uploads/1/3/2/6/132681938/natuwafegaga.pdfIn PDF document text
    • http://files.williamsburgrec.com/uploads/1/3/1/4/131437669/412f004.pdfIn PDF document text
    • http://files.woodbrookhuntclub.com/uploads/1/3/1/6/131637081/pilokozan-wiforubin-zefori-kolezafodasidug.pdfIn PDF document text
    • http://files.speiserlab.com/uploads/1/3/1/4/131410479/geteb.pdfIn PDF document text
    • http://files.minds-eye-marketing.com/uploads/1/3/1/4/131410009/wezavuvogifazalokip.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/1/0429/1274/3591/files/21072752757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/seborewusededuviwabija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/vudatowariluvikujedogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/karulupavexamob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/tikutowunekebuvisika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/72428852423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/acls_provider_manual_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9254/1589/files/zotenutadafuduguwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/75142680324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/wilitokaxudiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/jiretirererigolam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/advanced_excel_practice_exercises.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6200 5884 bytes
SHA-256: f6a40a394acc65c08a35d876b8dbe6ebcddb165c3ea45a2cc66fc5c4748e4a24
font_01_sfnt_off0000761d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 13168 bytes
SHA-256: 5d720be541251e794eedd9328b032627290050af6608da15227e5f18a6868bef