Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f72bb86c427fda3…

MALICIOUS

PDF

42.6 KB Created: 2020-08-22 04:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6181fd21d1a7eeba0c0da633f4d0e8ab SHA-1: f89abb4fca1be7476a9fd26837146ab5d09e3b1c SHA-256: 6f72bb86c427fda32ccf49e9a23d63f7f827ce86845fd9b46dca1d5b80c98f1b
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes text that appears to be a lure related to a school report, directing users to the malicious URL. The presence of numerous external PDF links further suggests an attempt to obscure the malicious intent and potentially distribute further content.

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.ru/pify?keyword=brecon+high+school+estyn+report In PDF document text
    • http://files.newbornknots.com/uploads/1/3/0/7/130740130/f15ff7.pdfIn PDF document text
    • http://files.westcoastminitruckers.com/uploads/1/3/0/7/130775537/2096428.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/1/0431/5031/1579/files/dinobotepejibawesetosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/90247163261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/95473771367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/33274290798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/mercruiser_3._0_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/34529545550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/12330802147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/50212147913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/9365/1610/files/amalgamador_millenium_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/textile_definitions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1378/2173/files/zerisavuganiwizilifixe.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 2

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_off000069d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 5136 bytes
SHA-256: 2405281a2deb62ab067dab8fee505ff71f794fa6d733446d582092e7040b2b9b
font_01_sfnt_off00007b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B51 10076 bytes
SHA-256: b5eafc2ae3430df1c1f6eda18b6c63d0de1259c4a24ce294579cd14e5b195fac

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