Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfbe3e49d03c09f…

MALICIOUS

PDF

30.6 KB Created: 2020-08-21 20:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 04aa2f9e4df17194e6d78de09987c16b SHA-1: b4b2f967b081c97bfb018490ef35d8ac80545083 SHA-256: 0bfbe3e49d03c09f7047619eae5f1991d41ba6909ef5e7c294f05ccd0343a461
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, disguised as free piano sheet music, which is a common lure for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the embedded URLs point to known malicious redirector infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=free+piano+sheet+music+hallelujah+chorus In PDF document text
    • http://files.qaradaki.com/uploads/1/3/1/1/131164236/266f0a8.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/1/0433/9567/8357/files/sample_character_reference_letter_for_court_child_custody.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/10172356798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/17034890171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/61987514064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9420/3806/files/objetivos_de_las_bases_de_datos_distribuidas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/vemixanomunepas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9694/8382/files/26562436560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/vevagawisegipadek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4908/6102/files/citroen_ds4_manual.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 3

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_off00003da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DA5 5204 bytes
SHA-256: 6b5afd68a6551c9baf54d3525aa6340af1fce650024d8a1f4728cb8a4b52aa82
font_01_sfnt_off00004f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F27 8980 bytes
SHA-256: 63fb209cca38c699d94165ee7dc56cc60b485cd7084609add52574e266ba4424

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