Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c27b62d25935620…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 13:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c05c8c88ff0ee876cb7f62e6c2f9649 SHA-1: 29d039b700f43b9f180fa2a94bade7fa3b894c7a SHA-256: 4c27b62d259356205d18714bee066b3e0100c50e8421d62e8fe5eded61b9bbdd
194 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=busybox+pro+revdl'. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=busybox+pro+revdl In PDF document text
    • http://files.nakuspcreations.com/uploads/1/3/0/8/130814466/4685304.pdfIn PDF document text
    • http://potediw.warrenkaplan.com/uploads/1/3/0/7/130776445/0e014b4.pdfIn PDF document text
    • http://files.seacoastdockdogs.com/uploads/1/3/0/8/130813710/loxena-wegedugo-mitotizanu.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/1/0431/7131/5876/files/anyone_can_whistle_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9007/4018/files/rumalepigirutot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/logique_de_l_argumentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/kujonukatofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/export_excel_sheet_to_using_vba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/dokepovijola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/95475272983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/50740359333.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 4

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_off000060f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F1 5160 bytes
SHA-256: 1441c83d5e48d85a434bcb1c4b2f8025130da4e618c9c4a0c6ca40ccab3140cf
font_01_sfnt_off00007296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7296 10788 bytes
SHA-256: e669718db3c741d648884b9083911b2bb12cac62d3e93426db6f7865effb8fb7

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