Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f51322fa7f23b9d…

MALICIOUS

PDF

35.6 KB Created: 2020-08-18 19:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4dcc98d1d149c700bcfba6f682e782e2 SHA-1: 56b02bcfbf93c0159414d57b099298d4fe3f87a8 SHA-256: 5f51322fa7f23b9dcb71c682bf2d9f4312ab3ba0329b17f11a3c5ad0ae791c23
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and text that mimic a movie download lure, directing users to a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate the document is part of a link farm designed to distribute malware or phish users. The ML classifier also 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=action+replayy+movie+song+hd In PDF document text
    • http://files.solanophonerepair.com/uploads/1/3/0/7/130738714/5030190.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/1/0433/8706/0378/files/matrix_organizational_structure_advantages_and_disadvantages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/18542024331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/text_in_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/general_psychology_topics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6471/2599/files/deliberao_arsesp_732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/42046770939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/wuxinazetirelupisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/1694180524.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 3

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_off00003ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EF1 5428 bytes
SHA-256: 19725ae6d9dc34b984d332963bb8e11da25a1f228c81fc16645ea90a7e6a448f
font_01_sfnt_off00005131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5131 10544 bytes
SHA-256: 99aeb5ba72e5514a21bee89b51cab9a6e2c568cc4d52d708402816ca76828176
font_02_sfnt_off00007440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7440 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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