Malicious PDF — malware analysis report

Static analysis result for SHA-256 722e8d795ed618e6…

MALICIOUS

PDF

59.2 KB Created: 2020-08-24 14:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2a62dabcb2cae8ad64dc66269946b27d SHA-1: d759d2e68118756edb6270d9ac2a6d25471f81ab SHA-256: 722e8d795ed618e65116b0571886332c6e8c87cee30099e01ca52855f231808b
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to a redirector service identified as malicious. The document body, though heavily obfuscated, includes text suggesting a lure for 'historical fiction picture books pdf' and references the wkhtmltopdf application, indicating it was likely generated programmatically. The presence of a malicious redirector and a large number of external links strongly suggests a phishing or malware distribution 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.cc/pify?keyword=historical+fiction+picture+books+pdf In PDF document text
    • http://kopumofex.weinclusive.com.au/uploads/1/3/1/8/131856214/nitepako.pdfIn PDF document text
    • http://files.artistcafeutica.com/uploads/1/3/0/9/130969659/74de3e6.pdfIn PDF document text
    • http://files.deft-touch.com/uploads/1/3/2/7/132710763/490733.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/1/0438/7084/7131/files/lagu_chrisye_full_album_80an.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2887/2341/files/nujokazozalekoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/80896445670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6521/2066/files/13082988294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/54756931097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/66559186919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/jujopigefazafuviworun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5974/7745/files/bearing_design_data_book.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 4

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_off0000ab72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB72 5316 bytes
SHA-256: 78502988248480fed70431019984f5d3b9a476faf43a1be7b3a0f4920252ee89
font_01_sfnt_off0000bd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD85 10156 bytes
SHA-256: c049110b7453f7bf45fba6675d2c0f0bcd0d167f24007582a891ec70bb610b77

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