Malicious PDF — malware analysis report

Static analysis result for SHA-256 953fbef9cb63ae92…

MALICIOUS

PDF

36.3 KB Created: 2020-08-09 01:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7cc70460c92af9d7356711fa4f0363e SHA-1: 739eb2fd6b891ec31d24d012ca310fc77e11f9ca SHA-256: 953fbef9cb63ae9254c755934356d5613cb41a93e17fffbf8074d0bbe8db80a0
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding numerous external links, predominantly to Shopify-hosted PDFs. A critical finding is the presence of a malicious redirector link, https://ttraff.com/pify?keyword=santa+biblia+de+estudio+arqueologica+nvi+pdf, which indicates a potential phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=santa+biblia+de+estudio+arqueologica+nvi+pdf
    • http://files.cassandras-corner.com/uploads/1/3/2/8/132814067/ziped.pdf
    • http://viwas.themovementbasics.com/uploads/1/3/1/6/131636903/7803489.pdf
    • http://files.fiftythreestarsandasun.com/uploads/1/3/2/8/132815752/lozozox.pdf
    • http://lugajo.divineinnermagic.com/uploads/1/3/0/8/130814328/lofenitunafi-linufipabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1713/2456/files/76917059358.pdf
    • https://cdn.shopify.com/s/files/1/0434/3005/2007/files/national_awards_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peboginesewuxexadamo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6611/1638/files/casio_hr-_8tm_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/77930958026.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/dipavo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7138/0383/files/boston_university_ap_credit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/rixaxujigugoxakuli.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/zegufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/29432362271.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/allium_sativum_medicinal_uses.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b85.bin
1f47dc6eee4be99e681fd980a20231c6b7574635f92b52cc59e168fc47d7bd12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B85 5752 bytes
font_01_sfnt_off00005f22.bin
84f58d53bedbf7cc7b1678737c23b8d028ba4e37b5c4e3cf0f09787aee51ebce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F22 10808 bytes

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