Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f27e7783e7f95c7…

MALICIOUS

PDF

33.4 KB Created: 2020-08-21 02:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23bcf234aa7bd21dfe4079c278d6eae4 SHA-1: 58c976915b59fe069b52acdf37788ff3de6139b9 SHA-256: 0f27e7783e7f95c79c14c20c4e5f59606f5a7cda9be4ec98ba4bda87dee50c5f
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though partially corrupted, contains text suggesting a lure for 'piano sheet music', which is then linked to a redirector. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=lightning%2527+s+theme+piano+sheet+music In PDF document text
    • http://files.calzadoleonsr.net/uploads/1/3/2/6/132682929/ladanomavo.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/37237973095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/76771148775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/82072333378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/kolenupojigalujisunewuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/tesesurobodeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/hallelujah_nuty_na_skrzypce.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9236/8798/files/surazumawisefew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/kenelanobomepibekifim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/wubas.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_off0000458a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x458A 5196 bytes
SHA-256: bd0809a28a218c55db8f14da65dc2d9154ac8af80b6bdd5c21ec3b4fc50960b6
font_01_sfnt_off0000571e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571E 9964 bytes
SHA-256: 27e186c8eb9055b22333fe244dbfdd22d4e77df2d936d9499defe62300aa87da

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