Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ce124b6ce3fc33…

MALICIOUS

PDF

39.1 KB Created: 2020-08-26 04:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9768d3f71cbc252651edfa65ef7fcea SHA-1: a59eca2b53a582de7a0e88ad66d00f5cff697f70 SHA-256: a8ce124b6ce3fc33010be80d46f0becea38eb81398bb664d35e9f5b93682a3c8
134 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is highly indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure related to children's paintings. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=smokker+til+b%25C3%25B8rnemalerier In PDF document text
    • http://files.chromecomputers.net/uploads/1/3/1/1/131163872/1313431.pdfIn PDF document text
    • http://files.x-ring.org/uploads/1/3/1/4/131483209/9000163.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/1/0428/9835/8432/files/nasodidupafulad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/chal_ve_tu_bandeya_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/83685378344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1836/1755/files/wofimefavabuwadavuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/agronomic_practices_of_wheat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7678/7103/files/craft_the_world_achievement_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/tevapisupunozalipexom.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
🗂 Part of campaign: chromecomputers.net 3 samples

Related samples 8

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Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDE 5100 bytes
SHA-256: 5b776fa59845e700e1295983ee3f72cff8c251574015f8cd720c958640d242b8
font_01_sfnt_off00006f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F12 9288 bytes
SHA-256: 1b92191924c504caa19083e82b3f676467f4036a3b5e53b96f08a525593089da

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