Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4982a0bd14d9bfd…

MALICIOUS

PDF

64.6 KB Created: 2020-08-18 20:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c19e715a61cd12969d877c238a2b5dd5 SHA-1: 958ea7d16a021233192ecefe8db1851d2ec3eefc SHA-256: c4982a0bd14d9bfd0aad58ee17bb9ffc75d43ff6ab0ed6057aad35711a75c7f2
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a piano sheet music download, aiming to lure users to a harmful site. The PDF also hosts a large number of external links, many pointing to Shopify, likely for SEO manipulation to improve the ranking of the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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=the+disappearance+of+hatsune+miku+piano+sheet In PDF document text
    • http://files.joerussellphotos.com/uploads/1/3/1/6/131637374/5649061.pdfIn PDF document text
    • http://weritoko.bellstobritain.com/uploads/1/3/1/6/131607163/5897340.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/1/0437/6176/2455/files/30946578030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0870/files/645063100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/32645232961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/html_table_template_with_inline_css.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6641/6534/files/rapejurowazozurol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/70650905299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/xuxidovud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/64522767728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/mixexebipofekij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/tecnologia_de_la_informatica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/8752744583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/doxefidulimuz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3C 7200 bytes
SHA-256: 8eba5026ae21d06a5a839ed5dfcc3b96bbedd2c8cb4f621998218b06becb252f
font_01_sfnt_off00009266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9266 5376 bytes
SHA-256: 3808060e103d77689bd77a8452a386d0470d9ca690cae4ed3871a3404812c4e6
font_02_sfnt_off0000a485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA485 17672 bytes
SHA-256: 3e8bf3d26513cebe07ded34fad379cbe73ef725cc3c6426350c53ca7c4537555
font_03_sfnt_off0000dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 17212 bytes
SHA-256: 7346ead4b0003e59f6fccbad71943e3c1772702f3dd9506c2916a0e1081307ee