Malicious PDF — malware analysis report

Static analysis result for SHA-256 615b33436f8eaa17…

MALICIOUS

PDF

57.1 KB Created: 2020-08-15 02:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 79d501b274eea3ba2a482764f6b8a61a SHA-1: be684df7a701c619a9e3c6be8aa2f9db4d9a3208 SHA-256: 615b33436f8eaa17be3b330c3f6fcaefa02d77f5bdd177b947740124c294fb13
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, with a critical finding of PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into clicking it. The ML classifier also strongly flagged this PDF as malicious.

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=elder+abuse+mandatory+reporting+victoria In PDF document text
    • http://vexadaduk.globaltakeoverfx.com/uploads/1/3/1/1/131163909/dubunofife.pdfIn PDF document text
    • http://files.michaelrplewa.com/uploads/1/3/0/9/130969645/sazobidexegeju.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/1/0436/2698/7680/files/89801629731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/where_is_naxxramas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0413/files/banco_venezolano_de_credito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/ajit_singh_song_punjabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/rifts_world_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/python_tic_tac_toe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/xadazixisajafup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/muworivajoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4963/2415/files/ninoburi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/pagaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/6319635916.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1AA 5652 bytes
SHA-256: 5dd3c87a5454f1c563fbc0a8cc917625df502abef247259749423d5c29cb0c65
font_01_sfnt_off0000b4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D5 10124 bytes
SHA-256: c71440748db130357031876af89f8e1b5dc05173cf820218f8eb494baac0053e

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