Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e9de918f7b60e0…

MALICIOUS

PDF

44.3 KB Created: 2020-08-17 04:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b3fc991a2ba49de505ff2ba36f9bce08 SHA-1: 1c55a0084d0b58e97ce5f7e1365b62085bfba739 SHA-256: 51e9de918f7b60e059ccac749a54f9d400e25aa85fff6db26cd9d6b7a7aea658
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=ada+guidelines+hyperglycemic+crises+2017', which is flagged as malicious. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document, likely intended to redirect users to 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=ada+guidelines+hyperglycemic+crises+2017 In PDF document text
    • http://ranode.holyisland.ie/uploads/1/3/0/7/130740145/letikubup_vesixevefa.pdfIn PDF document text
    • http://files.caricature-portraits.com.au/uploads/1/3/0/9/130969503/1168195.pdfIn PDF document text
    • http://files.labellavitaitalia.com/uploads/1/3/0/7/130739783/bosazazawo.pdfIn PDF document text
    • http://files.goodworksbuilding.com/uploads/1/3/0/8/130814118/7899144.pdfIn PDF document text
    • http://levukogox.namctristate.org/uploads/1/3/0/7/130740025/9183508.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/1/0428/4196/4710/files/70867108263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/19424902868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/65146647986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0910/3256/files/android_marshmallow_6._0_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/shrimad_bhagavad_geeta_in_english_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/linedancer_magazine_step_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/83178625643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/69893529091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/microelectronic_circuits_7th_edition_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/73905896156.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_off00006da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 5984 bytes
SHA-256: 65b8a43743d2d3f11f26fe3f121b084a0897873c70f1e5030fa514e71f4ab449
font_01_sfnt_off000081e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E3 10160 bytes
SHA-256: 859ca0dfd9ffe20d4cba418f65cb75440f883c1869aa6979b1723a2f389a0097

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