Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed3908ba16a9a60…

MALICIOUS

PDF

47.9 KB Created: 2020-08-03 00:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca7d4d0c2e24e0eef24dc8df56a606af SHA-1: d7e82d0d55719e7416f835471b1af5bd7f59e687 SHA-256: 4ed3908ba16a9a60a90027594f521eaac640b1b5d315167e7c77e5b643a78063
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=hori+rap+4', is identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of numerous links, including a malicious redirector, suggests an attempt to lure users to harmful websites.

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.com/pify?keyword=hori+rap+4 In PDF document text
    • http://files.chelseanswagner.com/uploads/1/3/2/6/132682090/kasiviro.pdfIn PDF document text
    • http://files.sebosw.org/uploads/1/3/1/3/131383743/pijudulime_netuxasonaximu_sekuvamererej_dinawizu.pdfIn PDF document text
    • http://files.ecolodge-laketiticaca.com/uploads/1/3/0/7/130776040/mixadaxitosifan.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/1/0433/5697/9351/files/python_sort_tuple.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/zosirupigigafelam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/javascript_distance_between_two_coordinates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/mifevudigefufaxesobobixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/jitupapivifexizene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/nizazixasak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4361/7959/files/48146205140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/vokugobedinavituzelesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/java_se_binary_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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_off000069e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 4652 bytes
SHA-256: 180b4998113c7dfdc45706644fb67119db6db849ac7b8c7187d0513eb4f031ef
font_01_sfnt_off000079c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C5 10524 bytes
SHA-256: f0743f046174823851eaf0d94c6db67f0243855f36a88efab68062d57dfdfd86
font_02_sfnt_off00009df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF0 16140 bytes
SHA-256: 19e255409fbf182c2678ab5d8029c3bd2bf6cbbda009d055a5ec68d167d819e9

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