Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5dbdabf5b2235c…

MALICIOUS

PDF

36.6 KB Created: 2020-08-13 17:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d505e7ceac35a745c53a64e902a1b292 SHA-1: 1f3d6d0c52a03f94124d7c1b555b6a4ffe8a2009 SHA-256: 9b5dbdabf5b2235c66d0e47bd5b90a22842203f9a229e8097d8dc66688103398
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to link farms designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to lure the user into clicking this malicious link under the guise of research material.

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=jurnal%20penelitian%20jagung%20manis%20pdf In PDF document text
    • http://files.coefyouth.com/uploads/1/3/0/7/130775111/selumaxut.pdfIn PDF document text
    • http://vuxaxubi.newrockprepacademy.com/uploads/1/3/1/4/131453301/zafevor_kivaxezoxusaren.pdfIn PDF document text
    • http://files.finalfinishdetailing.com/uploads/1/3/2/7/132710655/levin_linebedanelu_vidaki_vukadidi.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/1/0436/0051/1138/files/talexulebokipifabigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/90800238151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/agriculture_business_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/noraterel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/campbell_biology_test_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/tozefoxuvoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2460/5599/files/27056108190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5308/8921/files/56945987444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2304/8610/files/acrobat_reader_edit_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/61027730667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/33796288110.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_off00004fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB7 5428 bytes
SHA-256: 945dcdb46436e52ea4d38badeab3a74e432fb230c369c3ffe2f92f04c56f4145
font_01_sfnt_off00006217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 10420 bytes
SHA-256: 109153e4a2a82193a39b8f8944f0ad0107edef82ac39b6dbd8608ef3304b5c46

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