Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df18abb52b977bc…

MALICIOUS

PDF

54.1 KB Created: 2020-07-29 03:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ff9d805cb29c770e147483212673c4c SHA-1: c329b04b3b0d0b5976122c8fc4ea9fbbcac0bb26 SHA-256: 1df18abb52b977bce24c59d6bbbb585218e7f18c38accdcc55b290de06d7dc47
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to a known malicious redirector. Another critical heuristic, PDF_SEO_LINK_FARM, highlights the presence of a mass external PDF link farm. The document body itself appears to be largely obfuscated or contains metadata rather than user-readable content, but the presence of these links strongly suggests a malicious intent to redirect users to harmful sites.

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=structure+of+higher+boranes+pdf In PDF document text
    • http://files.thevinenyc.org/uploads/1/3/1/4/131455956/bavupexerepu_kodopig_jagakid_nipewer.pdfIn PDF document text
    • http://files.mjsastro.com/uploads/1/3/1/3/131381363/tilejugoxeb_novexelunobuwa.pdfIn PDF document text
    • http://files.beckydolleycpa.com/uploads/1/3/1/6/131606046/591554.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/1/0430/4837/0333/files/naxujus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/28068970705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6760/4128/files/13680997792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0937/4365/files/83985669485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/kiniwujevage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/pivozofoxuxubufinukuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6784/1443/files/sikutogodututerawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/82347868375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/riwewamovonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/89458469980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/38467634027.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 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_off00009260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9260 5508 bytes
SHA-256: bce2d46c16151c8517d1adc91bc472b20b5fdc3b26ca9d1bad55d1ce57d5f1d6
font_01_sfnt_off0000a503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA503 11136 bytes
SHA-256: c9930d3c85306def94129b0216580df14fa42c935ae66b53b5f858611c449c83

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