Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f20d7d9c7a8fc87…

MALICIOUS

PDF

51.1 KB Created: 2020-07-28 21:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 913a46ded7d15ca7d687969ea9a6115a SHA-1: 62f4b926e7931e137ea045a40734730bca0aff8e SHA-256: 4f20d7d9c7a8fc87d4015ef5e68d6697b7666cc02a893a8565b9509033dc6819
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised with a movie song keyword. It also exhibits characteristics of a link farm, with numerous embedded links pointing to Shopify domains, likely to obscure the malicious destination. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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=agathiyar+movie+video+songs In PDF document text
    • http://files.trailheadmcs.com/uploads/1/3/1/3/131379181/956953.pdfIn PDF document text
    • http://files.positivesportcoaching.org/uploads/1/3/0/7/130739204/nafifex.pdfIn PDF document text
    • http://files.pondviewmanor.net/uploads/1/3/1/4/131452735/618e02833169.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0428/9835/8432/files/65545430121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6501/5460/files/sixonubulujumebupegapakeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/zusudulefuzajejipageg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/12828470311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/48357598993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/49596621595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/dirosilig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0515/7269/files/53664419671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/daxovonas.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000728e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x728E 19176 bytes
SHA-256: 4a3b19456581798e63837c05cff9f0ddf9be61d947757962007d926cdd56de46
font_00_sfnt_off0000612c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 5144 bytes
SHA-256: 8b5427b26a0cbed0cfe53574b69cf908cc88ebf81c4c6159c7831cacd7cdeb9a
font_02_sfnt_off00009ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA0 10060 bytes
SHA-256: 710cff074394a4d356d311868ea7a5bf474fc49c9ab69c8f9b0881f92de7757f

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