Malicious PDF — malware analysis report

Static analysis result for SHA-256 29831f57171f131b…

MALICIOUS

PDF

56.2 KB Created: 2020-08-07 23:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ef2fc0afd85af09586c501090c1988c5 SHA-1: 7251ae76286a43f0fb7540c6b9cc0333fa6041a5 SHA-256: 29831f57171f131b3dfc331b513613283dbd05485b8395ba7a7db1ccd63366c0
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic. The presence of a large number of links, many hosted on Shopify, suggests a link farm designed to obscure the malicious destination.

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=multivariate+data+analysis+techniques+pdf In PDF document text
    • http://muworaz.lernerlab.com/uploads/1/3/1/4/131453177/2085521.pdfIn PDF document text
    • http://files.rutgerscki.org/uploads/1/3/0/7/130776822/getus.pdfIn PDF document text
    • http://files.skardamaplefarms.com/uploads/1/3/2/6/132681836/5174281.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/1/0429/6006/0567/files/zasisebefinovup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/t_m_apostol_calculus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/roxaxurod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/98090596385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/filiduses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/wufituve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/34297660604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/midejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/3d_exporter_for_autodesk_autocad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8544/6822/files/chemistry_notes_class_10_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/pifafam.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_off00009d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D91 5536 bytes
SHA-256: 70b8e7cbbf030a288693464246d798924d1c25e11e63787390e23f94aa374218
font_01_sfnt_off0000b07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB07C 10356 bytes
SHA-256: b10c73e87f851d31c85cd458526d2a101f484bb4506ed147384acc35601573b2

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