Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcd7c701e9ee6cd…

MALICIOUS

PDF

36.5 KB Created: 2020-09-09 16:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03247d84f702e22838efd6bae191b211 SHA-1: 4adfa0cdc06ae9cc3bdfd953dd998a4b7ee2bb93 SHA-256: 3bcd7c701e9ee6cd422f992a98f13e50b73175e415f3a76fdac73b4e8aa40e8a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to redirect users to various external PDF files, a technique often used for SEO manipulation and to obscure the ultimate malicious destination. One prominent link points to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains keywords related to academic content, suggesting a lure to attract victims. No scripts were extracted from this sample.

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/wb?keyword=glycolysis%20and%20the%20krebs%20cycle%20pogil%20answers%20pdf In PDF document text
    • http://files.citystylistapp.net/uploads/1/3/1/4/131453733/zanebofixovuwoza.pdfIn PDF document text
    • http://files.embroideryequipment.com.au/uploads/1/3/1/4/131437689/tagopidenesos.pdfIn PDF document text
    • http://rozeko.artbeatarttherapystudio.com/uploads/1/3/1/4/131437886/seredavej_meruposo_piwujuvi_jibibiruxa.pdfIn PDF document text
    • http://zolakopi.skinsationalbylaura.com/uploads/1/3/1/0/131070722/tusatiwepidavulox.pdfIn PDF document text
    • http://fuxiwa.lauragambrel.com/uploads/1/3/1/4/131483281/nodegof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a12125_d1a3e33509454d41a29dc407bdf7c507.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2ac059802fc34f08872ac0a45fc587c4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6a22cb_05cc5aeaaf684d82b2e041d056cdfb76.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a7074a_a3c798443db4449c981002efcf89fe8a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2ca22b_e112f974c9f34a7a9711ae7aa1d57020.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5b5da7_2522f561435b43c39147694f6a1e5712.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 4

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_off00004ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECB 5848 bytes
SHA-256: 5291d09904e71068325c21956c824b19744583ea8f4715db04dc50ac749d33ac
font_01_sfnt_off000062c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C6 10208 bytes
SHA-256: d396b76b05f232adf36597fbeaea1d8ee30e1efa866a0e9a6b36e303cac249a6

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