Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a89f9f2061a637…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 02:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0074b1ce27ee81757b87bfc12dba3996 SHA-1: 9155ff5cc4254e1fabe4f69a1e74f336d2ec1b03 SHA-256: 38a89f9f2061a637154bb594a8236d22a06ad2fbdd1b14691c2326030789813f
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=formentera+balearic+islands+holidays, is identified as a malicious redirector. The document body, though heavily corrupted, appears to contain keywords related to holidays, likely as a lure. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=formentera+balearic+islands+holidays
    • http://files.freedomhoops.org/uploads/1/3/0/8/130813357/5078164.pdf
    • http://jagoboz.lewiswalsh.net/uploads/1/3/0/8/130874493/287509.pdf
    • https://cdn.shopify.com/s/files/1/0448/1299/2672/files/using_complete_square_form_to_factorise.pdf
    • https://cdn.shopify.com/s/files/1/0440/0332/8150/files/metro_pcs_rebate_status.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/19975768915.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/solid_angle_arnold.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/bangla_islamic_baby_name_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/tipos_de_arbol_de_decisiones.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/72983424008.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/nudipijaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/4557/5061/files/fimarum.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/88748697543.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_off00006a10.bin
d394638877f872c87b1a5e050eafc1bff06662ca5b13e084a2e5b66b707135be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A10 5376 bytes
font_01_sfnt_off00007c25.bin
58070036871c351527cb8d0d806a8e4fd4ed4785316057a235d05b353d1da8a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C25 10596 bytes

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