Malicious PDF — malware analysis report

Static analysis result for SHA-256 604c33492ebfec2b…

MALICIOUS

PDF

48.3 KB Created: 2020-07-27 11:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aaa376bee8e23a89bac1d7aa8ab96416 SHA-1: 316328536bdf2a2b1804b6dab393b0cbb1eed8a9 SHA-256: 604c33492ebfec2b3161efb6e2e86a698aaa83c75c69b8d0bc384205a398c0f4
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 as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains text fragments related to registration and the wkhtmltopdf tool, suggesting a lure. The presence of multiple PDF links pointing to external resources, including a known malicious redirector, indicates an attempt to lead the user to a compromised or malicious site.

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=b+form+registration+number In PDF document text
    • http://files.investmentpropertyworldwide.com/uploads/1/3/1/4/131453679/1967856.pdfIn PDF document text
    • http://files.rambestproperties.com/uploads/1/3/1/4/131406892/2334021d0284.pdfIn PDF document text
    • http://files.wellspring-creative.net/uploads/1/3/0/7/130739027/gesatinelosunaseti.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/1/0427/9602/3975/files/bujuburofukikamun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/81601086080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/jagivixove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1676/5088/files/bolujuzew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/69297139315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/towijamegeripodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/20638066112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/20033354986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/tigelix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/buginanogusefid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/61104828778.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 4

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_off0000806e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806E 5128 bytes
SHA-256: 26b6a9c01fddbbf191a2e002269192e719c597108dfe15d31f1a3250039a5df3
font_01_sfnt_off000091c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C7 10116 bytes
SHA-256: 4935dfd4ec312b579960055b1baf139477b8f5ba31b03e79307ff84fc6b86c22

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