Malicious PDF — malware analysis report

Static analysis result for SHA-256 3159cc7370aeef79…

MALICIOUS

PDF

37.8 KB Created: 2020-07-27 19:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05883f41a1e9f32fefc1b0730501f61a SHA-1: 3c684b420d1af2400f7a94a719d68d0eb01b0ee4 SHA-256: 3159cc7370aeef798cbcdb151b88dde8f134c6cab4331c188392d0b0a60034c0
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains keywords related to movie piracy, likely serving as a lure. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to serve further malicious 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=tamilrockers+2019+tamil+horror+movies In PDF document text
    • http://files.nadialouderback.com/uploads/1/3/1/4/131406811/7f588a3200c.pdfIn PDF document text
    • http://files.legalandcommercial.com/uploads/1/3/1/6/131606330/jetuvuzumalut_votidub_lepijepofokat.pdfIn PDF document text
    • http://files.cyclonecompanyevhs.com/uploads/1/3/0/7/130738559/607666fce99b37a.pdfIn PDF document text
    • http://files.erikassuperstarbling.com/uploads/1/3/2/6/132695636/a229b0dec.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/1/0428/4104/7206/files/lupidibofiwigebadozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/13334934947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/489125347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/63927675049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/puvovaleso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/fewomazirixisusage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/70605599863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/sadetetinavakuzikubakid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/xixutasilekukuzupaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/33944724029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/mafumuvebiguziwetimewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nikosodazowolelupok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/61620953836.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_off0000582e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x582E 5276 bytes
SHA-256: 0f46bc367ce639464d162d8c5ce2d898f255545779089ee15406d87c37507314
font_01_sfnt_off00006a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 9388 bytes
SHA-256: 5d58c09925f7de14d07a0cc619123f83c22687fa26408005b81cef9e1fc01d33

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