Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c4684e9d54f87b…

MALICIOUS

PDF

47.7 KB Created: 2020-09-22 00:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e29eb2ea59371f0b8e7415d626028f9c SHA-1: b10ede810f44182d5a3e48cf198689246d22e201 SHA-256: b9c4684e9d54f87b70a6fe568f2632bc36f0f8d1f9b59c39b675af7d99942082
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is largely obfuscated but contains the "achy breaky heart" string and URLs that align with the heuristic findings.

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.me/wix?keyword=achy+breaky+heart In PDF document text
    • http://litiras.christianjzanetich.com/uploads/1/3/0/7/130775111/4820315.pdfIn PDF document text
    • http://kunifa.sflat.net/uploads/1/3/2/6/132696030/jijan.pdfIn PDF document text
    • http://files.beadsandleather.com/uploads/1/3/2/6/132681536/4159012.pdfIn PDF document text
    • http://daxabetu.corktownstudios.com/uploads/1/3/0/9/130969559/9502361.pdfIn PDF document text
    • http://jotofopal.healdsburgflowers.com/uploads/1/3/2/3/132303307/ccfaf14e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/duzenizidekumonedupen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/pejabab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6221/4304/files/revef.pdfIn PDF document text
    • https://14a0f991-5c4b-45ee-8825-0bfcadea3a18.filesusr.com/ugd/04e6f9_de9598c2708f4be0b70083b9980a4a23.pdf?index=trueIn PDF document text
    • https://470238dc-c7b1-4185-bd89-1c9b317990af.filesusr.com/ugd/89c6ad_de7f70f29dac47cfaa2e4759b6ead024.pdf?index=trueIn PDF document text
    • https://8d33b6de-2332-44b2-9c74-1b18f65f595f.filesusr.com/ugd/1fbf8b_bc24a78a81db4337ae91d49c9faeac36.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7206/9525/files/step_up_medicine_in_nepal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/ccna_tutorial_for_beginners_in_hindi.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 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7157 4496 bytes
SHA-256: f46f214d87216a018de9ef5b92bc632c6f5a7050172e3a87bdd7bced0df51812
font_01_sfnt_off000080b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B2 10412 bytes
SHA-256: ee3a02b7a577b336a2113deacab956ae4226d525adc395fa493f118c12a4198e
font_02_sfnt_off0000a46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA46B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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