Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84483ff4e57a5dd…

MALICIOUS

PDF

58.0 KB Created: 2020-08-10 01:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e671089585b9a710ed0e5cc1bcdce1e SHA-1: 8310ed388591229c3f72104120451da46b7470a4 SHA-256: e84483ff4e57a5dd4442d01b109d03f8475d8532e8c66b04915de2865e2690e0
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=texto+argumentativo+ejercicios+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0431/0371/5481/files/dusefosutewe.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack pattern.

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=texto+argumentativo+ejercicios+pdf In PDF document text
    • http://files.hr-conference.org/uploads/1/3/1/3/131380889/dudaze_fodifef_xakomivuz.pdfIn PDF document text
    • http://files.oleksyphotos.com/uploads/1/3/1/4/131482975/5150473.pdfIn PDF document text
    • http://files.theartswithpassion.com/uploads/1/3/0/9/130969153/niropokoj.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/1/0431/0371/5481/files/dusefosutewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3088/0162/files/dupoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/arabic_language_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/gizexagewelasubigomab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7727/9652/files/asapscience_the_new_periodic_table_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/psp_racing_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/99718776626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/xekopuxitatekop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/12159745890.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 5

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_off0000a0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0AA 5596 bytes
SHA-256: 0940b5ee3a8f2bb48cf56616360cb8e559ff66e0f4015f27f79bb0e69435dc36
font_01_sfnt_off0000b3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B4 11580 bytes
SHA-256: 56545623f6c1ec07ac24b58f6c054e7d6f517bee4d9fa86d228e5ad279e93b6e

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