Malicious PDF — malware analysis report

Static analysis result for SHA-256 3631d303c54fbc50…

MALICIOUS

PDF

50.2 KB Created: 2020-08-06 22:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2cf0519b2b189c04cfd5a23dbf545ec SHA-1: ea1569b5bd74cfe47bd9469339864bf25a8bac62 SHA-256: 3631d303c54fbc50d150f885e0e688f56d4becaed5e477654c123f6d96bec65a
194 Risk Score

Malware Insights

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

The PDF file contains embedded links that lead to a redirector service, which is a common technique for distributing malware or phishing content. The document body, though corrupted, suggests a lure related to an Arduino schematic, aiming to trick users into clicking the malicious link. The ML classifier strongly indicates malicious intent.

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.cc/pify?keyword=arduino+uno+r3+board+schematic+pdf In PDF document text
    • http://files.simplified-networking.com/uploads/1/3/1/0/131071056/basiziwipos.pdfIn PDF document text
    • http://files.kylaandedgar.com/uploads/1/3/1/4/131437457/tiratilamo-zemujolakafu-birurez.pdfIn PDF document text
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdfIn PDF document text
    • http://files.nourishingrootswa.com/uploads/1/3/2/6/132682048/6221942.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/1/0433/3443/4969/files/pathway_atresia_ani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/glee_season_5_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/sevuzabofewod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/wizosodonevejutero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/noran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/gowabubegades.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8022/0823/files/declaration_de_cession_de_vehicule_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/11938772940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3633/6551/files/9631179263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/wafobid.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 8

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_off00006430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6430 5656 bytes
SHA-256: 18b8df96636f2f902d68b8546ca50de8649b59b53315c0e5cdc0925f5b2abb2a
font_01_sfnt_off00007742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7742 9912 bytes
SHA-256: 6f5b24b4f76cd3ab841cb94aa25ee8f7f1ab2d4def2c76b9261edcc7e34da7b8
font_02_sfnt_off00009985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9985 20308 bytes
SHA-256: 0be085c0ddbd1123341abe9f13e2e3bb73d4e84ff180435f17c9c47d90f97f0a

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