Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdb255960293aa5…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 21:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8b8949458a977b06b6ad56cc1715aee SHA-1: d4408cf2b2502e9691944b4ba669b109471c83a2 SHA-256: 3fdb255960293aa5a49b177cf297a1fb934f4fd3dfde17e43a3ff21c86972140
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to these URLs. The primary attack pattern appears to be a link farm designed to redirect users to malicious content, likely for phishing or malware distribution.

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=arduino+lcd+display+project+pdf In PDF document text
    • http://files.foryourmilitarymarriage.com/uploads/1/3/0/9/130969986/lumuxaj.pdfIn PDF document text
    • http://files.changemanagementassociates.com/uploads/1/3/1/3/131379894/kasewabu.pdfIn PDF document text
    • http://files.tradinggains.com/uploads/1/3/2/3/132303238/fakiguxixa.pdfIn PDF document text
    • http://files.elambaptistchurch.net/uploads/1/3/2/7/132740865/pefigugizivu.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/1/0432/3213/3278/files/59001898006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/pejugowusirupirowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/kujonanowumuvinidemojif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/76829242547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/29361558083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/maxwell_unfortunate_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/rexumisezopafirisisepiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/80925519590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/annona_muricata_antioxidant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0842/9977/files/roca_bathroom_fittings_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/45418599419.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 8

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_off00006841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6841 5316 bytes
SHA-256: 1c1ec6c6c63e19d782d2f61a77ca13bca0506ab90cacc9b10f6a79598850a4ae
font_01_sfnt_off00007a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A77 10076 bytes
SHA-256: 04fb5bf11e154bc744f64342b690e2a3c53578a848eb1af8f16628bbf330f902

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