Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3b9990cf338f66…

MALICIOUS

PDF

38.4 KB Created: 2020-08-24 00:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06f290a7713a2d59c13afffa2a29094d SHA-1: 5060dd3bf7be7cf776b5fb7af85d829de34a3b64 SHA-256: ae3b9990cf338f66a3507ad55ee7e89c3e71967d6feb87fcae68b9bb738392f9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'Daikin ceiling ac manual' and the malicious redirector URL. The PDF_SEO_LINK_FARM heuristic also indicates the presence of numerous external links, suggesting a link-farming or redirection tactic. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

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=daikin+ceiling+ac+manual In PDF document text
    • http://files.ethnoarts.com/uploads/1/3/2/7/132710627/8b0bedce5d96.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/1/0434/2064/7576/files/gudag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/zogipug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/87727021011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/22079498042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/vawex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1114/4861/files/vocabulary_about_environment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/37346971398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/multiply_strings_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9194/3584/files/67064246646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/wopilinoxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/97672045921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/85576397000.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 1

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_off000052d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D9 4908 bytes
SHA-256: d423319fc0732d5adfbddc044200b67977207e84842ed849c04cae8116116b3a
font_01_sfnt_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 13300 bytes
SHA-256: 16363cb39a382934e9cc03b7efdf46a88cfcc4af0977a0ee5ba7a9f1aba6644f

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