Malicious PDF — malware analysis report

Static analysis result for SHA-256 64436d623cf0aabb…

MALICIOUS

PDF

45.2 KB Created: 2020-08-15 16:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: edadebc29b6bd611010d920a13c7e3b1 SHA-1: fe60c77b988e00fea19e5c90dd5ae008b91d65eb SHA-256: 64436d623cf0aabb67daa883e9cc0f8bd14b757203b51c3f0a3e4a5249753bd9
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and a link farm designed to host numerous external PDFs. The document body, though heavily obfuscated, contains URLs that are part of this redirection chain. The primary lure appears to be a disguised download button leading to the 'ttraff.cc' redirector, which is flagged as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ambledown+gap+claim+form In PDF document text
    • http://files.nforchestra.org/uploads/1/3/1/4/131453219/bodotiruluvuke.pdfIn PDF document text
    • http://files.coloradobusinesshalloffame.org/uploads/1/3/1/4/131408502/2698966cb3.pdfIn PDF document text
    • http://files.alwaysgetbetterstronger.com/uploads/1/3/1/4/131437295/fopurigiki_femad_vizep_nurikolatuvirok.pdfIn PDF document text
    • http://nilofafof.dpoffice.org/uploads/1/3/1/3/131380042/4c78c84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/rogue_multiclass_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/webejej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9420/3806/files/kelovopimodawajojovudatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/definition_of_work_ethics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/kenmore_progressive_vacuum_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/fitokutur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/devix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/kabudefikitezofivojom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6488 5228 bytes
SHA-256: 060f63bb24a961f4693900283ce22cb03deebaff0b1b2c414872cbaef946d3ab
font_01_sfnt_off0000763b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 10488 bytes
SHA-256: 7acbceb7e31bf1b9672cd5a2a1c7b1642c967a4dc5e9a26dc24e5260105bacca
font_02_sfnt_off00009a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A17 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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