Malicious PDF — malware analysis report

Static analysis result for SHA-256 81fc50b02a1eaedb…

MALICIOUS

PDF

57.0 KB Created: 2020-08-16 00:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d3e98f76436e24f1b9faca7e0ab613b6 SHA-1: 437c0a8981257b7ef041f0ae212df49981843794 SHA-256: 81fc50b02a1eaedb50d7c44a73c0f4c3b9463f8e40dd963fe75bc311457253e7
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, disguised with a lure of song lyrics. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, suggesting an attempt to drive traffic to malicious infrastructure. While no scripts were directly extracted, the PDF's nature as a redirector points towards a phishing or malware distribution attempt.

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=wagon%20wheel%20chords%20and%20lyrics%20pdf In PDF document text
    • http://files.csunigc.com/uploads/1/3/0/8/130814121/burunuxonum.pdfIn PDF document text
    • http://files.shawneecabinets.com/uploads/1/3/1/3/131382583/dulutorefopipaf.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/1/0428/9835/8432/files/1741554469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/alimentation_entrale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/xekasewijefavuzoxafevem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1855/5292/files/byzantium_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6848/9881/files/48020983023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/77478942294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/69615203901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/mekolugotefawevidifimono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6865/1680/files/47958328513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/bipafuzuzibazoloweda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/vubujawuzamoposufapipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/96533688269.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

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_off00007e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E93 5624 bytes
SHA-256: 086881192dff0b943d1e121aa0fa1fe81d859ca278546cf518682c853b8aa7bd
font_01_sfnt_off000091c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C7 15352 bytes
SHA-256: 8ad0a2427a9848d1f10578c08fb724ee189747e019ff37ba30cb4c6fbc2c3e1a
font_02_sfnt_off0000c18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18B 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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