Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e615749dc74131…

MALICIOUS

PDF

38.4 KB Created: 2020-08-24 13:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e408064e245c9b6a14918829f6eb2b2 SHA-1: 99d20ce9bca329b8b2e4967d6d1999e3e09b7a80 SHA-256: e2e615749dc741313e95444d5a7afa205ba139c9c74855d1b48c541be7c26e7f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to external resources, which is indicative of a link farm or redirection scheme. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains references to the primary malicious URL and several benign-looking Shopify URLs, likely used to mask the malicious activity. The ML classifier strongly flagged this PDF as malicious.

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.ru/pify?keyword=cftc+cot+report+chart
    • http://nawonew.a-1autoinc.com/uploads/1/3/1/4/131453724/sozavosijun-gizamugano-xaxusufuzevi.pdf
    • http://sedigo.travelblogbylily.com/uploads/1/3/0/7/130738870/sonigilolape.pdf
    • http://files.betinagozo.com/uploads/1/3/1/6/131636956/c50fbe338d1.pdf
    • http://famijovu.atomicconcepts.net/uploads/1/3/1/6/131637562/dopulufiroj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3958/0575/files/dejizinopaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/nomofovipebewi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/idioms_worksheets_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/9137/7828/files/pewevepem.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/24015780432.pdf
    • https://cdn.shopify.com/s/files/1/0437/7575/4389/files/bavikejevaroneneg.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/xomedanasigozosovimujanof.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/60711158176.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/beneficial_ownership_certification_form_fincen.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/20681138191.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_off00005acf.bin
bad8f6399f80bdff6c41a6a2d17dda813c261163ef59957be6c64d440bf87757
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACF 4796 bytes
font_01_sfnt_off00006b16.bin
310207841cc1431f66533ad808fab7473b28ab6c35af7eed316d2e9d30c0b5c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B16 9980 bytes