Malicious PDF — malware analysis report

Static analysis result for SHA-256 10728d550dabf8d3…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 23:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f6403e1f2ef3a62d899cd0bc13b656c SHA-1: 6511fd171dab09d4b2b9f17bf77a1d2ca4f02a88 SHA-256: 10728d550dabf8d373d7e3a4a0631a319bacf51021b7d2465b5e8c6bd50bea8a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing lure. The primary redirector URL is identified as malicious. The document body, though partially corrupted, contains text related to 'Dna and genetics worksheet' and the malicious URL, indicating a social engineering attempt to trick users into downloading potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=dna+and+genetics+worksheet In PDF document text
    • http://files.themummysomniac.com/uploads/1/3/1/4/131453712/9289979.pdfIn PDF document text
    • http://xoduler.libertytechcharter.org/uploads/1/3/1/4/131483152/5a99507b.pdfIn PDF document text
    • http://files.covid19atf.org/uploads/1/3/1/4/131482930/6354e.pdfIn PDF document text
    • http://files.cityrisingfarm.com/uploads/1/3/0/8/130814515/xilarap_xujaxu_vaxub_logajumipopuzo.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/1/0432/6939/0500/files/you_are_cordially_invited_word_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/chiari_malformation_symptoms_in_dogs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/data_analysis_research_report_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/92210788654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3537/5254/files/benefits_of_descriptive_research_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1573/2381/files/tevikifipamilas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/letras_chinas_abecedario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/nolisekonugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/81980300006.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
🗂 Part of campaign: bolsterrogers.com 6 samples

Related samples 4

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_off00005d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3C 5324 bytes
SHA-256: 2c0ec005ac7cb4c3aeef64601aa542d46fc28ec57149079a372a4b01dffaec86
font_01_sfnt_off00006f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 10308 bytes
SHA-256: d7a37bf8ce361689905784e8237bc453bc472ce7249ae6f28cabe8404c5f13a5

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