Malicious PDF — malware analysis report

Static analysis result for SHA-256 7290fa0409defd98…

MALICIOUS

PDF

39.1 KB Created: 2020-08-13 03:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d0484cef742fd4f28ef1118b94f02c3 SHA-1: 7660da0893a209626f82c37124ab351bf5ef0b75 SHA-256: 7290fa0409defd9856699ea302e7411ed622574975c0397f30cb34f09e994c26
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure. The document body, though heavily obfuscated, contains URLs that are also present in the heuristics, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly supports the malicious verdict, indicating the file's primary purpose is to redirect users to potentially harmful sites.

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/wb?keyword=microsoft%20word%20use%20pdf In PDF document text
    • http://wewuxulo.conleyxc.org/uploads/1/3/1/4/131437462/8bee11ad.pdfIn PDF document text
    • http://files.4mustain.com/uploads/1/3/1/3/131381706/3411411.pdfIn PDF document text
    • http://files.tjeducationalleader.com/uploads/1/3/1/4/131483138/1a5b7b.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/1/0438/2480/8096/files/xupopokiwaxezil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4488/7963/files/22125436990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/mac_gba_emulators.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/fugoxaxetajuligokenur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/raspberry_pi_zero_otg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/a_twist_of_the_wrist_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/tidolilesabupiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/joint_probability_density_function_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/facebook_code_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/hamartome_mammaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/53000536415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/aswath_damodaran_corporate_finance_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/rubowuzasela.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_off00005d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D70 5004 bytes
SHA-256: 154197d91d900f6725902e05719db99057c2aae37a906a3ab19c071c68a231f8
font_01_sfnt_off00006e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E98 9704 bytes
SHA-256: 1bc6f379e126d197a9f5d61d56df1e7665762e4848481f9faddc6cd1e951bfa2

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