Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c47961d159ff97c…

MALICIOUS

PDF

37.1 KB Created: 2020-08-06 17:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81dc1346b2d68609f005db7be7c4069f SHA-1: 5c698859e094fcd8431979dfe37c6981434fc5be SHA-256: 4c47961d159ff97ce9d4d022790e6013d38418b93a0f52f8f961eace4f94b83a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of many Shopify-hosted links, some with numeric slugs, further indicates a link farm designed to manipulate search engine results.

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=holmes+introduction+to+sociolinguistics+pdf In PDF document text
    • http://files.europlast-okna.pl/uploads/1/3/1/3/131379904/1047465.pdfIn PDF document text
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdfIn PDF document text
    • http://files.brothersinthewild.com/uploads/1/3/0/9/130969543/73c184c8f8063.pdfIn PDF document text
    • http://files.marksoftime.com/uploads/1/3/0/7/130775795/dunubo.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/1/0435/9625/1304/files/43860148147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/rolinererepobod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/zesuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/php_port_scanner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/dusov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/mitalakuxonazijofogupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/48625514920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/33031270637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7204/5734/files/99_range_guide_osrs.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5379 5224 bytes
SHA-256: 5e1b88192008a05f7b228fd1ad378fc2449cae92c39d75b37bf46fac40ee3974
font_01_sfnt_off0000652d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 10060 bytes
SHA-256: 18a6bd218adc9b6cd5074696619b644f66d7f1ba7cb8878d99932a95b1dff336

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