Malicious PDF — malware analysis report

Static analysis result for SHA-256 33275a3579e4f7ab…

MALICIOUS

PDF

59.3 KB Created: 2020-08-20 01:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4c6f101403f03f0858270e6728c0c78 SHA-1: 28578b5416d7905fc516227d84f1b3921f27b7bb SHA-256: 33275a3579e4f7abfef19a8288367f58bc82a241fd78f06167196b16cab0dada
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Amar Chitra Katha complete collection pdf', likely intended to trick users into clicking the malicious redirector. 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.cc/pify?keyword=amar+chitra+katha+complete+collection+pdf In PDF document text
    • http://files.visionsupportteam.com/uploads/1/3/0/7/130775292/09ebd97b.pdfIn PDF document text
    • http://gidalipu.camanchemobilehomeparks.com/uploads/1/3/1/1/131164250/zigosigeduweperako.pdfIn PDF document text
    • http://files.jcmconference.org/uploads/1/3/2/8/132815002/rapakogegofad.pdfIn PDF document text
    • http://xapuru.mysuidora.com/uploads/1/3/1/4/131437626/nonumodawizerafos.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/1/0434/1468/3815/files/crsu_date_sheet_b._ed_2nd_year.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85155057715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/setadijuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/bekasetor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/ludanumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/the_adventures_of_tom_sawyer_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/social_work_progress_report_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4674/3709/files/difference_between_plane_stress_and_plane_strain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/pojabatelogukowekaxore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/6533/8014/files/rationalist_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3803/8423/files/73457837348.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_off00009d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D81 5272 bytes
SHA-256: 1194befafab6ec5e9b98c1bae037634d7066e81a234ff610b56382758ba464d9
font_01_sfnt_off0000af3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3D 15812 bytes
SHA-256: 0bb13e7dca5ef322dd16016bca6e923569a1e67be425e2e4e37b5aef659ce4b0

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