Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65c3e2e0d276f19…

MALICIOUS

PDF

59.8 KB Created: 2020-08-12 06:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cfa3fc3970e01e34bb3b0d00ce1027fc SHA-1: ae1c485591a8b0dd409a240714c3919cbd816ce3 SHA-256: c65c3e2e0d276f198378c383f115eed86a975004950fa1e8bb427cc9dab6b571
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to a redirector service, which in turn points to a large number of other PDF files hosted on Shopify and other domains. This indicates a link farm or SEO manipulation tactic designed to lure users into downloading files. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links further supports this assessment.

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=la+vie+en+rose+piano+sheet+music+easy+pdf In PDF document text
    • http://files.unitedmattresswarehouse.com/uploads/1/3/1/0/131070588/4895816.pdfIn PDF document text
    • http://files.wtho.org.nz/uploads/1/3/1/3/131384127/vezolazukosiginovuzo.pdfIn PDF document text
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdfIn PDF document text
    • http://mozerob.amausbc.org/uploads/1/3/1/4/131411688/f20f75fa1cb8.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/1/0433/0507/4838/files/25834438335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/dedosegivuvutoxenumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0043/4586/files/numerologia_cabalistica_significado_dos_numeros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/pifedorux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/mijalafojabibedetajumoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/zilodovufikemuwexalapeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/alesis_qs8_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/netobinezowevonaviges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/workplace_wellbeing_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/49595410864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/bosons_and_fermions_in_quantum_mechanics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/7674266415.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9681 4540 bytes
SHA-256: 1c45ae965081101187260ee0301d40b4e3d12d29f5343a822c4eee2c9ac0513e
font_01_sfnt_off0000a63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA63C 5464 bytes
SHA-256: 3c4008d2af39d205ba1558d0c565cffce4331466fb1dfd4ea76eed37d285db22
font_02_sfnt_off0000b8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B9 11760 bytes
SHA-256: 213a54eff8f834d9f21cc8ea2429b6f1f49622e40426434b2ba563dbaa6aa394