Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdd7f43b94f32cd…

MALICIOUS

PDF

41.2 KB Created: 2020-08-16 19:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 939ae077d268caea712eb845b2471f2b SHA-1: e88cba0fc731ca427ed784ce663ff2b7854637e7 SHA-256: 1fdd7f43b94f32cdf3bdb2697c5bb95dbe7dd508279eda99ee3ad36a77f18c42
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link and a link farm. The document body contains text related to 'Hip hop violin sheet music free' and a URL that redirects to a known malicious domain. This suggests a social engineering tactic to trick users into clicking the malicious link, likely leading to further malware download or exploitation.

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/pify?keyword=hip+hop+violin+sheet+music+free In PDF document text
    • http://vulamo.idrha1.com/uploads/1/3/1/4/131483492/nusiborezodegawexiv.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/1/0433/3902/2494/files/amlogic_usb_burning_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3771/9717/files/grammar_translation_method_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/company_swot_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0301/0459/files/accounting_and_bookkeeping_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7554/files/83172812663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7763/9075/files/bexumoxemujexolonutij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/nenuweserobexonanob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/dimension_breaker_guide.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 1

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_off000063d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 5064 bytes
SHA-256: 6e21531d3da3d825452cc4a4ae575c5762794ab9d83d8f429f50b640a20e92c1
font_01_sfnt_off000074e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 10472 bytes
SHA-256: 9c0074d0b28762ece3de9a9f361d5ec514e6218cfb9f702af5e3fb6d87556a84

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