Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f020c5ef5a3bf02…

MALICIOUS

PDF

40.3 KB Created: 2020-08-01 17:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6758325f12f0f8ed8079dd61151061d9 SHA-1: 4835f3d4703f47d21db137670b1984d5eff46259 SHA-256: 5f020c5ef5a3bf0270101b9b9e2ff4b3d4185da17b5e2b450f201eb79d8a8979
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious SEO link farm, as indicated by multiple heuristic firings. The document body, though heavily obfuscated, contains text related to an 'Arduino blink led' and includes the primary redirector URL, suggesting a lure for users interested in technical projects. The ML classifier 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.com/pify?keyword=arduino+blink+led In PDF document text
    • http://files.clonbonnyns.com/uploads/1/3/0/8/130814007/nozugekoxinolexemed.pdfIn PDF document text
    • http://files.elenalourenco.com/uploads/1/3/0/7/130740017/2134571.pdfIn PDF document text
    • http://files.harborlandscape.net/uploads/1/3/1/4/131411688/lapitume.pdfIn PDF document text
    • http://files.cityofnewhall.com/uploads/1/3/2/8/132815220/poxinixevo-rulirizotago-pavugigifodog.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/1/0431/1298/8821/files/37399248847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/64080478438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/76114184327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/6617084096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/34368307483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/kofibukemitewefuzipolebax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/87498371573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/49658351521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/75561443730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/75001781908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/tusomexirebuleloparozexav.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 5

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_off000060f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 4624 bytes
SHA-256: 326f778ab1e43655f31b220043faa04f125a1f4f963992a195b9f0c461a38344
font_01_sfnt_off000070be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BE 10772 bytes
SHA-256: 694d2c60522f5eedf0a5a6a2c85464414c5a4d0123d06a13b7f6138721825523

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