Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8084c91efc9878…

MALICIOUS

PDF

120.4 KB Created: 2020-08-13 07:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf61f8a3df06ebfc9e7ee4a21181eb05 SHA-1: 86e4b86924bf23230de69af082868f8dbba3323b SHA-256: 9f8084c91efc9878df4e38dd6851b30b1c08628104a327e6a17865910490a2ff
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to a URL that is part of a known malicious redirector infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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/wb?keyword=laser%20b1%20student In PDF document text
    • http://files.ankionthegroove.com/uploads/1/3/1/0/131070971/7001051.pdfIn PDF document text
    • http://mavebigo.olympiasouq.com/uploads/1/3/1/4/131452903/pikopasepapo-nipuwuwoxukikaw.pdfIn PDF document text
    • http://files.glambarbyceline.com/uploads/1/3/2/6/132696104/0fa34a6c45e.pdfIn PDF document text
    • https://ttraff.cc/wb?keyword=laser%20b1%20student's%20book%20answer%20key%20pdfIn 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/1/0435/2344/0792/files/nukotenuvaxupakopum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/60277289282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/najedoginimovuzuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/strategic_management_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/vexitagiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/34503439746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/bakteri_bacillus_anthracis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/36501345597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7448/5400/files/bovamikajumebimuvapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/wetozejoninuletenufox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/gtd_weekly_review_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/50206021311.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_off00018e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E86 5428 bytes
SHA-256: f3b90fab0726f84ac50b9ef2c1d1323ce0537e47d77c1b762b20d7b90de0de4a
font_01_sfnt_off0001a12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A12B 16260 bytes
SHA-256: c967e4959c5fc5096d9cdf857a30884269960e4a7b0381a647bfec452236ca31

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