Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee542c227058e838…

MALICIOUS

PDF

36.5 KB Created: 2020-08-17 14:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c781bb5ae1c30735be81f0f76c736dd SHA-1: b9d082cf1776a5a4c4880218a861ffe6af3793ff SHA-256: ee542c227058e83889332f5e5461660597d0ba7809d49990f39af58def900418
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.ru', indicating a malicious intent to redirect users to potentially harmful content. The document body, though obfuscated, contains text related to 'Amoeba sisters meiosis video recap answer key' and the wkhtmltopdf application, suggesting an attempt at SEO poisoning or a lure for educational content. The ML classifier 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=amoeba+sisters+meiosis+video+recap+answer+key In PDF document text
    • http://pibalowan.nikharfashion.com/uploads/1/3/1/4/131437363/tunifofuvodivuper.pdfIn PDF document text
    • http://files.entreepartyband.com/uploads/1/3/1/6/131636927/092fe573ee7a28e.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/1/0429/8063/8879/files/anarkali_old_movie_songs_320kbps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6238/5045/files/mokodomeguzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/padisenifekerurupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/newujifodabexutur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/78977023129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/characteristics_of_computer_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/wizine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/41094940945.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 1

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_off000043b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43B9 5424 bytes
SHA-256: f0be64ba02096029fcdb76b1e3e4f4820b69057bec4577b7f0b8e38a2fb7aabe
font_01_sfnt_off00005620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5620 9564 bytes
SHA-256: 057667b85e3c9a14eec4dce5a71a47181dff70f43380068bda08eb9bc5a2bac6
font_02_sfnt_off000076f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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