Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de10543198be45b…

MALICIOUS

PDF

35.5 KB Created: 2020-08-16 15:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b28366d4ab8b5f818c67d29567b5ba1 SHA-1: e194a14a1f29cbfdbdb732fecdaa5c7c738c61f3 SHA-256: 8de10543198be45bcf30b36d7531f8c8df7458a6cb1143d483e3720115764b5d
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many of which are linked to external PDF files hosted on various domains. This pattern is indicative of an SEO link farm, likely intended to boost search engine rankings for malicious or spam content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=cranial+bones+labeling+worksheet', is flagged as a malicious redirector.

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/pify?keyword=cranial+bones+labeling+worksheet In PDF document text
    • http://files.linlinkyawhtet.com/uploads/1/3/0/7/130776489/7908300.pdfIn PDF document text
    • http://teroroza.wellbalancedfolsom.com/uploads/1/3/2/8/132814930/20337.pdfIn PDF document text
    • http://mabajetig.caribbeanmemoryproject.com/uploads/1/3/1/4/131453433/wafizarajukaru.pdfIn PDF document text
    • http://files.tomnoblehomes.com/uploads/1/3/1/3/131398134/gutuj_falonumulinumig_sidiwo.pdfIn PDF document text
    • http://files.ephratamartialarts.com/uploads/1/3/1/4/131438464/8124226.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/1/0440/1584/5541/files/cbse_affiliation_bye_laws_2020_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/basic_of_java_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/67454288688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1310/4028/files/fincen_suspicious_activity_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/tripadvisor_chiang_mai_tour_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/bevepoxaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/31809840937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/79877078511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/waputoserogulomomedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4383/1464/files/34625709820.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 6

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_off00004c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C77 5148 bytes
SHA-256: ae89a009c5f02aec52ce0db9f6f9f49a7105b2e86247385b926bc24e3fb0e6ba
font_01_sfnt_off00005dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFE 10284 bytes
SHA-256: bb164f776acacaaf2bdb6f86d97e533b19fc6db121a6e8bcca4f4ef0dd2c9c66

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