Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2ecebfdfff67a6…

MALICIOUS

PDF

45.3 KB Created: 2020-08-21 09:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9db416b6f4a73a58d01c0d52bdb2f08e SHA-1: 27919e30fdd5bfab176be2bd506bf3b88c51d225 SHA-256: ab2ecebfdfff67a6b4a4c3d24213db9fad8a46177c6f9baa4a62850fa35c59fa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to sheet music, likely serving as a lure. The PDF also contains a large number of external links, as flagged by PDF_SEO_LINK_FARM, suggesting an attempt to abuse search engine optimization for distribution. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.

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=carol+of+the+bells+easy+sheet+music In PDF document text
    • http://files.flintmetroleaguesports.com/uploads/1/3/2/6/132695535/nawivukur.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/1/0432/2911/8627/files/nedukoweger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/54771745043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1272/6677/files/monthly_expenses_excel_sheet_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/78354662502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/xolimolebite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/80778222238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/the_handbook_of_stress_neuropsychological_effects_on_the_brain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/amar_ujala_hp_epaper_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5856/1173/files/audit_associate_interview_questions_and_answers.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_off0000647c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 5268 bytes
SHA-256: 0047be47bf42f416d193d7f172df504062fb86ce0c3ba95806621d4cebab366d
font_01_sfnt_off00007649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7649 15560 bytes
SHA-256: 8605ddc84cff9794eb7479f77a8f22c32c8a4259376e649ac755c9c2142fd161

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