Malicious PDF — malware analysis report

Static analysis result for SHA-256 18403db620a7bc9d…

MALICIOUS

PDF

35.3 KB Created: 2020-08-22 01:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e753685d63428a4a19eaa20faa5a90d6 SHA-1: 4374e85ebbde9913a76447bde609e7f27fba8dcd SHA-256: 18403db620a7bc9d7dfc0fcc85c4c6174a82e59eafcfaa1b20a73d6949f063ec
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by heuristics. This suggests the primary purpose is to redirect users to malicious content, likely for phishing or malware delivery.

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=bhajan+odia+new+song In PDF document text
    • http://files.mountaincitymasoniclodge.org/uploads/1/3/1/4/131438113/173b2b9559.pdfIn PDF document text
    • http://netax.quickrunbag.net/uploads/1/3/2/6/132682035/kejezugowi.pdfIn PDF document text
    • http://xanezebox.dan-williamson.com/uploads/1/3/0/7/130775181/7755c968073d2d.pdfIn PDF document text
    • http://files.windyflatfarm.com/uploads/1/3/2/8/132815968/mipux.pdfIn PDF document text
    • http://files.cookyourfeelings.com/uploads/1/3/0/7/130739383/soxotimuri.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/1/0440/6634/1029/files/18376792911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/lymphatic_circulation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/6148728412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/baldur_s_gate_enhanced_edition_full_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7817/9221/files/25312086440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/56182151556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/pyp_scope_and_sequence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/97103536150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/86346337617.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000502f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x502F 5176 bytes
SHA-256: fd6ff7c929b6d1ba6b882d6d22a59757943fad8f1068019e81fa343682cc8a02
font_01_sfnt_off000061dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DC 9076 bytes
SHA-256: 6e5dfacbfc530bee50b6cef09a2351c8d8de15b22131c1d6327c07dafebb0daa

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