Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f55d62e715423f…

MALICIOUS

PDF

34.8 KB Created: 2020-08-05 06:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 952d409ef65da7951d0ab4561f00fd6f SHA-1: 3d1369f822295d7f05ab31107e727a9a6eda1e83 SHA-256: 81f55d62e715423f3859eb5c8c38cd91866e251a1787add5355b69f442359618
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate sheet music, but they redirect to a known malicious URL. The document body itself is heavily obfuscated, but the presence of the malicious redirector and the SEO link farm heuristic strongly indicate a phishing or scam attempt. The embedded links are likely intended to lead users to a compromised site or download further malware.

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=video+games+lana+del+rey+sheet+music+pdf In PDF document text
    • http://files.regenpreneur.com/uploads/1/3/1/4/131454272/7081380.pdfIn PDF document text
    • http://files.louisescott-bushell.com/uploads/1/3/1/3/131398145/zedurilekibolezubo.pdfIn PDF document text
    • http://files.matasconsult.com/uploads/1/3/0/7/130775308/rejufawiwojager-vekul-wozovez.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/1/0436/4979/4213/files/bejiwevepido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/togove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9424/4516/files/27224356111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/56820658280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/malaysia_airlines_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/ssa-_561-_u2_fillable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/jspdf_autotable_line_break_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/xinobaselezugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/85574626542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1777/0920/files/araken_de_assis_manual_da_execuo_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/setivel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4237/3785/files/juxobudosalegasiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/sakozukip.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 8

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_off00004a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A78 5636 bytes
SHA-256: b0f0219799995d4eb74fb1f214912ca5522373464408abaa1f6aa3287a18adfc
font_01_sfnt_off00005d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 9432 bytes
SHA-256: cd4675b78327f9dbc47d352e6efafbb01638906c9e7f7a9d58d68141a63261a6

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