Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef5dc19d742228d…

MALICIOUS

PDF

39.6 KB Created: 2020-08-21 20:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 557555f5ea235d67efb6a1a9b4ff0374 SHA-1: 652d94782dd90bca282f2cf6692585d21b7feba1 SHA-256: 6ef5dc19d742228d752820ee8bc668eb49fbac329e53d82e9bc430e7ca695598
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The presence of a 'download button' lure further supports a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest it's designed to redirect users to malicious content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=bairava+video+song++starmusiq In PDF document text
    • http://files.capricecrawford.com/uploads/1/3/0/7/130776776/e85cf84bf10ea.pdfIn PDF document text
    • http://dujifom.corkscrewcollectors.com/uploads/1/3/1/6/131637316/mimibeluvusubidome.pdfIn PDF document text
    • http://files.carlosamrhein.com/uploads/1/3/1/1/131164024/74177bd13b17f.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/1/0437/0094/5048/files/akama_miki_and_zhang_muyi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/astigmatismo_regular_e_irregular.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/56404256485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/votosarabobuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8603/6635/files/43136354303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7107/0617/files/ruwaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/thus_said_zarathustra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/57548471107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/22891026799.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 3

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_off00005b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B68 5348 bytes
SHA-256: ca9f4fa64fc0e6f92c2fc4dac738d7e456ca60fd645d3267e480c92d44e3a80f
font_01_sfnt_off00006d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 10720 bytes
SHA-256: 417513c9de4747b0b58961368aa9a9b831338eaef116794be7c09902dc10a575

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