Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca4be05115c9274…

MALICIOUS

PDF

55.7 KB Created: 2020-08-08 05:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2a44259dda5499f9d652692176df9b24 SHA-1: fef96a286b4eae09cf146bc3a068efc92eaeacf2 SHA-256: 6ca4be05115c9274a86cf694dd86b9dbfb0491d71141f5c43560decbff8a643d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and redirects to known malicious infrastructure, masquerading as a free course download. The ML classifier strongly indicates maliciousness. The primary IOC is the redirector URL, which is used to funnel victims to potentially harmful content.

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=curso+de+ingles+gratis+pdf+completo In PDF document text
    • http://files.dorkygringo.com/uploads/1/3/1/4/131482819/dezukapud.pdfIn PDF document text
    • http://gupiwe.ms-kyles-kids.com/uploads/1/3/1/0/131070450/sumutox-lizakolibi.pdfIn PDF document text
    • http://files.marjorieorourke.com/uploads/1/3/2/3/132302816/lefigokopuko.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/1/0443/2130/8828/files/the_believers_authority_andrew_wommack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/35223617322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9418/0001/files/27197316899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9742/4026/files/katumetabeleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/laguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8501/1869/files/xikulesujamirasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0579/6774/files/jopudutiroletimulomukunab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/joxepifenavugupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4757/9811/files/chain_of_infection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/aquatic_plants_list_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/ringtones_from_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/romigetoralik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/rosewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/james_stockdale_courage_under_fire.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 6

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_off00009a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A38 5380 bytes
SHA-256: 8aa75358b95c5957d8ed6560c36dab94ae096dee5d1608f4d98b3e97ce4c8b75
font_01_sfnt_off0000ac6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6D 11204 bytes
SHA-256: 04dc014a7bfc14032a969899250d381557b2b0aba0178652ec3180ae568bb360

Open this report in the interactive analyzer, or submit your own file for analysis.