Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e9cfe3744707cc…

MALICIOUS

PDF

44.0 KB Created: 2020-07-31 04:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30ee09f12ce9ed2618d8c5368a438009 SHA-1: d7c42341bfa8bbe62a51e84e166256b818db8791 SHA-256: 91e9cfe3744707ccc64cca19d306602357cb538f91d80933b8945ae76fc14a28
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=asme+section+ix+interpretations+pdf`. The document body, though heavily obfuscated, appears to contain keywords related to 'Asme section ix interpretations pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to download a malicious PDF. The heuristic `PDF_MALICIOUS_REDIRECTOR_LINK` strongly indicates malicious intent.

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=asme+section+ix+interpretations+pdf In PDF document text
    • http://files.doggiedao.com/uploads/1/3/0/8/130814058/879804.pdfIn PDF document text
    • http://files.brainwavesummer.com/uploads/1/3/1/8/131872055/3991036.pdfIn PDF document text
    • http://files.butternutbrookequinecenter.com/uploads/1/3/1/6/131606291/2540467.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/1/0432/2436/7262/files/35665996704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/73381558199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/fefanasuraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/52639864163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/dinalotowuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/zaxiwidunepebera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/38547467305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8402105605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/sokavedugetijopanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/raresej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/63035068203.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_off00006e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 5112 bytes
SHA-256: 4fb88f72b749455a138837ff79f2edb751ee9e1fd8d29a5119ba63411bf39611
font_01_sfnt_off00007f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F65 10560 bytes
SHA-256: 245260c5ea4a831aa3601cb2c3174f5aef15436f7753a9cb91ced7dc5114449f

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