Malicious PDF — malware analysis report

Static analysis result for SHA-256 624d11b88265b492…

MALICIOUS

PDF

40.7 KB Created: 2020-08-01 04:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0a73e2e3356d8cefe8f43e58c64850eb SHA-1: c613723392bf78963d18208db9d20788b64dfca6 SHA-256: 624d11b88265b49225469cad8a01b960d7d3c23175e68b2d788d5dba49ea3d86
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though obfuscated, contains a URL that matches the redirector, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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=character+in+a+beatles+song In PDF document text
    • http://files.fasttraxathleticclub.com/uploads/1/3/1/4/131407823/3bbed2daacba.pdfIn PDF document text
    • http://files.chaosdragonboats.com/uploads/1/3/0/8/130814216/julel_furujuxuxu.pdfIn PDF document text
    • http://files.bestwoodmyanmar.com/uploads/1/3/1/4/131453998/8706778bf0c.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/1/0431/2629/2629/files/juvinajepabane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/91586810904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/dapilonuwigopenus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/41406744730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/rosewonaputedakubevefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/4036863675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/lakavigowazujozibevenasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/15588079241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/lijoduxabovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/xefirowivixujimarufivamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/kunurebun.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
🗂 Part of campaign: bestwoodmyanmar.com 3 samples

Related samples 7

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_off0000627b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 5104 bytes
SHA-256: 1fb28f100a0af5dae4c6f18cbc19422cd35e2a1e8792460f83805a6f65418f9b
font_01_sfnt_off000073cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CC 10044 bytes
SHA-256: ec5240297da610e42bf90cae80250760cfeb93ae8518fe3c0405d474837850ae

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