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)
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 a lure disguised as a 'dna and genetics worksheet' which embeds multiple links. One critical heuristic indicates that a link points to known malicious redirector infrastructure. The document body also contains a large number of links, many of which point to benign Shopify URLs, but the presence of the malicious redirector link and the overall structure strongly suggest an advance-fee scam or phishing attempt.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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
    • http://files.themummysomniac.com/uploads/1/3/1/4/131453712/9289979.pdf
    • http://xoduler.libertytechcharter.org/uploads/1/3/1/4/131483152/5a99507b.pdf
    • http://files.covid19atf.org/uploads/1/3/1/4/131482930/6354e.pdf
    • http://files.cityrisingfarm.com/uploads/1/3/0/8/130814515/xilarap_xujaxu_vaxub_logajumipopuzo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/you_are_cordially_invited_word_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/chiari_malformation_symptoms_in_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/data_analysis_research_report_example.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/92210788654.pdf
    • https://cdn.shopify.com/s/files/1/0440/3537/5254/files/benefits_of_descriptive_research_design.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2381/files/tevikifipamilas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/letras_chinas_abecedario.pdf
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/nolisekonugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/81980300006.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d3c.bin
2c0ec005ac7cb4c3aeef64601aa542d46fc28ec57149079a372a4b01dffaec86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3C 5324 bytes
font_01_sfnt_off00006f64.bin
d7a37bf8ce361689905784e8237bc453bc472ce7249ae6f28cabe8404c5f13a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 10308 bytes

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