Malicious PDF — malware analysis report

Static analysis result for SHA-256 7231c68a87126522…

MALICIOUS

PDF

37.2 KB Created: 2020-08-18 13:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 941c5d118cbf23b57042b75d1ab1e889 SHA-1: dfbdc003fb710ac885b73a6a58dda8e1df867ced SHA-256: 7231c68a8712652253c71635f39fd9055fe17aa538af55afa2d1e049ab02271e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract traffic and potentially distribute malware. The ML classifier strongly indicates maliciousness, and the presence of redirector links suggests a phishing or malware delivery attempt.

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=the+ten+commandments+tablet+template In PDF document text
    • http://files.eabindia.org/uploads/1/3/1/3/131383456/bde18d25a600b18.pdfIn PDF document text
    • http://wabodonu.thepurchaseflutestudio.com/uploads/1/3/1/8/131856476/rizad.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/1/0435/3690/8439/files/zifudafidepabodunawubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/jizawuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/the_lottery_by_shirley_jackson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1327/4780/files/bakery_business_plan_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7366/2115/files/walefatibazipuliji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/29377029989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/lukaguwawub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/83854762653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0864/5541/files/510718396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/bacteriuria_asintomatica_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/74618152418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/kerenot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/29144487135.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_off00005396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5396 5304 bytes
SHA-256: ae54d6c0c78e189ddd519a930e5d957559790dcf9c5233ca7aaa3a97ab036db4
font_01_sfnt_off00006569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 10044 bytes
SHA-256: 0059d7d0232aec9b9a83190ed7be4540a6526a57cd26767ef9bcc6d4e13f453c

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