Malicious PDF — malware analysis report

Static analysis result for SHA-256 8383b9969a5abeea…

MALICIOUS

PDF

56.8 KB Created: 2020-08-18 15:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d15d0117f5b801900da772e5ef00f1c SHA-1: f8e7fbe0bfca259e44e2eb70b0c0105ae55d2521 SHA-256: 8383b9969a5abeea64ada63d2039219ea4f3cb530610f1b4997f7de8c5308451
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links, including one to a known malicious redirector (ttraff.cc) disguised with a lure related to 'year end report card comments pdf'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body, though heavily obfuscated, also contains the malicious redirector URL.

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=year+end+report+card+comments+pdf In PDF document text
    • http://tinomuwup.jbirdsnacks.com/uploads/1/3/1/3/131379803/jebiduf.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/1/0438/3732/5472/files/vocabulary_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/business_case_study_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/96055165997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/92961057956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/lopezizizejagixexisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/62482252388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8381/6359/files/5943966064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/6303/6315/files/2792132434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/rekijopoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/rugavatajupajuke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000970e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x970E 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off0000a109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA109 5232 bytes
SHA-256: f1d0203f503b9f6d3999c98b4711342dfc0bc656912b6d86fe4d731de88c2666
font_02_sfnt_off0000b2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B9 10420 bytes
SHA-256: c72a9171233075bb830e064e2135f13891a1f283082520e83dc9a56254eef40a

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