Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5b21d3b2bd917c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-11 14:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6656be2cc3ed5d62d9d5c96b094687d8 SHA-1: 6a2c4c7543239b99626b43ea5f2d0c8a25fbbdfa SHA-256: bd5b21d3b2bd917c195d3f7f376180c84ee8519279e4c2e4817a09ff6d74aaed
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to obscure the primary malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.ru/pify?keyword=brihaspati+dev+vrat+katha+pdf as malicious. The document body, though partially corrupted, suggests a lure related to 'Brihaspati dev vrat katha pdf'. The numerous links likely serve to distribute traffic and evade detection, ultimately leading to the malicious redirector.

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=brihaspati+dev+vrat+katha+pdf In PDF document text
    • http://files.strtsmrtbrnd.com/uploads/1/3/0/9/130968984/deponukoz.pdfIn PDF document text
    • http://files.bloodsugarbikemagic.com/uploads/1/3/2/8/132814958/6480127.pdfIn PDF document text
    • http://files.vlmpto.org/uploads/1/3/0/7/130739510/9304533.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1966/4540/files/63790695092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/zoxux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/xojepopemaboj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/12022661832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/xasuxasopadava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/manual_apa_version_6_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7063/3624/files/xarifixukiferan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/6353863166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3614/6855/files/vizosogupezodukobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5692/2778/files/fumodesisa.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 7

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
font_00_sfnt_off0000521f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x521F 4840 bytes
SHA-256: 74150a7c19f87443af5857ad0f052bd63cc5513954e98018ffb7deb6a300e661
font_01_sfnt_off000062a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 9732 bytes
SHA-256: d50972f9abc6f8cb57b5a70e9bf271ad83f4979788ae4649dfb86eee5a06cc20
font_02_sfnt_off000083fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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