Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12a78e367c71cbd…

MALICIOUS

PDF

43.2 KB Created: 2020-08-07 13:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b97ef7a7a6c7028311ae239b3e6a921f SHA-1: dd421d4687beafa75f3be4b679bcc067d9042238 SHA-256: e12a78e367c71cbdcde81550a3194655daec5a6f0310a060f889478907258a59
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.ru/pify?keyword=d+d+5e+character+sheet+editable+pdf, which is presented as a Dungeons & Dragons character sheet to entice clicks. The document body, though heavily obfuscated, contains references to this lure and the malicious URL, confirming the intent to redirect. The ML classifier also strongly indicated maliciousness.

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=d+d+5e+character+sheet+editable+pdf In PDF document text
    • http://kerimevaz.afhdesigns.com/uploads/1/3/1/4/131482975/kesud.pdfIn PDF document text
    • http://files.michellehowelldesign.com/uploads/1/3/2/6/132682925/2aaf8178.pdfIn PDF document text
    • http://files.jujumask.com/uploads/1/3/1/3/131379875/169665.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/1/0428/2567/9015/files/sevazexisagoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5938/8320/files/rovidasejikovobanivaxulal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0409/9740/files/git_branching_model.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/jutajabukukegefuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/fixiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/pregnancy_and_human_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2007/2613/files/83316262316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/zuzusabuvexemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/vogukagaziwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/48967425026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/business_plan_for_bookstore_cafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/passione_pizza_antonino_esposito_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1401/1555/files/business_english_vocabulary_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/84455756010.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_off000068c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C0 5504 bytes
SHA-256: 1eda42317efad48d944e1355b5c10c9b2d0795a962573c13afb75a6089d492bf
font_01_sfnt_off00007b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B72 10488 bytes
SHA-256: da8d42c0b7de2d6b7e7d4d47ec427cab7d53e2b693e7aff69ca7fd199a522f22