Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc65380070992d3a…

MALICIOUS

PDF

48.7 KB Created: 2020-08-12 15:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d46e293bdd032ab71c203bd0d1ccb29d SHA-1: c50f4b37cda6fb7f3f72c2f55cb35296cdfd7f6a SHA-256: dc65380070992d3a5bc245bd93d0049cfca0008321a929419543a131de303651
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL identified is https://ttraff.cc/pify?keyword=joint+pdf+probability+examples, which is likely used to redirect the user to further malicious content. The document body, though heavily obfuscated, contains this URL, suggesting it's part of the lure. The ML classifier also strongly flagged this PDF as malicious.

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=joint+pdf+probability+examples In PDF document text
    • http://files.joyenomoto.com/uploads/1/3/0/7/130739076/0693709aa.pdfIn PDF document text
    • http://files.rbawebdesign.com/uploads/1/3/0/7/130740213/kojobesawetesog.pdfIn PDF document text
    • http://pavez.emilysarahmatthews.com/uploads/1/3/1/8/131871721/rozalokugodowig_wajomul_sopipitekikeme.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/1/0431/3032/3095/files/sigevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/types_of_addressing_modes_with_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/rojoden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/rabinavebesigavimiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/20482322635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/jupivusekaletak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9815/9769/files/24512616374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0657/2197/files/activity_ratios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/tazifodazosiseliwuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/69774521372.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A2 5484 bytes
SHA-256: 87d628caed3d1e103d1209d50a969595f623970cb280adba8895a25d300db174
font_01_sfnt_off00007a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A39 11156 bytes
SHA-256: 81823aa93df0b3546316e203d686bc7f781f8ce7d2e80a61144ca5e2266fadb4
font_02_sfnt_off0000a010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA010 16144 bytes
SHA-256: d2e8f35aa05d0d02945a1b1bdc5933ca749d080bce15cea5d2eb2ee77cfae92e

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