Malicious PDF — malware analysis report

Static analysis result for SHA-256 0255298830f1f570…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 01:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ced7221acf9d4197a6a8837fb81fa0f2 SHA-1: 366e33e5d184452b4ef3608a89ca0955968dfe4a SHA-256: 0255298830f1f5709ccf42bc2edbd037c596e17b3b4e724040d7da81cc0bee0a
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, masquerading as a free download for "piano music notes for beginners pdf". This is supported by heuristics indicating a malicious redirector and a link farm. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely as part of a phishing or scam campaign.

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=piano+music+notes+for+beginners+pdf In PDF document text
    • http://files.christineyared.com/uploads/1/3/1/1/131163617/7431910.pdfIn PDF document text
    • http://files.burghyart.com/uploads/1/3/1/8/131871772/vevelu.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/1/0440/6912/6309/files/31816577606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/27168117802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/cara_kerja_antasida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7650/1148/files/diagnosis_of_type_2_diabetes_mellitus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/theories_in_sociology_of_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4010/3845/files/brian_aldiss_supertoys_last_all_summer_long.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0062/7363/files/18565612450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/75801261697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/75472915319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/79744373663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/domadenulowuboloko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/33200582126.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_off00005f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 5584 bytes
SHA-256: e39c36b7adaf686059471601d2698fb5f2ec8d49be238b3c4be055e8c5eda92b
font_01_sfnt_off0000721d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 10132 bytes
SHA-256: 0e07479bb85fa5a26d93b6c0d020db2d19bfd6a2986f0e81ab11405d2b524493

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