Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3bdb005f68d790…

MALICIOUS

PDF

51.5 KB Created: 2020-08-13 12:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff34dc3170eae85b72cb69903dec08d6 SHA-1: 40f616297c7e49770ef4330682c6dafb6bbcc3f5 SHA-256: 5d3bdb005f68d790995e86acfcf4b6aae66fb2921aa53f2e3f7a4f103b226b9e
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users searching for 'digital modulation types pdf', leading to a redirector.

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/wb?keyword=digital%20modulation%20types%20pdf In PDF document text
    • http://guvuduvip.ibnghareeb.com/uploads/1/3/1/4/131437987/dimemir_wiwexikirarija_jewix_tekikorado.pdfIn PDF document text
    • http://files.leongsmeathousekauai.com/uploads/1/3/2/6/132681443/xenidevigo_pamogo_pofugoferirol.pdfIn PDF document text
    • http://files.americanfoursquare.us/uploads/1/3/2/7/132740218/majibomavapakabopi.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/1/0431/2861/9168/files/16401003886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/fukuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/aprender_caracteres_chinos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/durarulivonolamanisugaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/22111388630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/pay_pal_fees.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/new_aadhar_card_application_form_download_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/zujamepurigukatenukubupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/reralowut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/aromatic_heterocycles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/fujedotuxilidowivagefale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/cashless_policy_and_economic_growth_in_nigeria.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 8

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_off000089fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FE 5364 bytes
SHA-256: a7cdc98ad7a050035127e54849974b29f09c554d83d405da0e70162ce1310012
font_01_sfnt_off00009c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C43 11156 bytes
SHA-256: 768d53a6a455f54e6e264b35a1cda2e02a5fe732502466562e3cc38a1ca8c6ed

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