Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae419744463304ac…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 02:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42c05f3dd65b221940b653fb3ac94fe SHA-1: 60b921f6bef767566c1ce777a12e34a1c0276d3e SHA-256: ae419744463304aca21ffbbd8e7becd301a397dfcde3cbac4e2c049b109550ae
150 Risk Score

Malware Insights

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

The PDF contains a link farm, with multiple links pointing to Shopify and other file-hosting services, disguised as driver downloads. The primary malicious link, 'https://ttraff.cc/pify?keyword=bixolon+srp+350+driver++windows+10', redirects to potentially harmful content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to evade detection through a large number of external links.

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.cc/pify?keyword=bixolon+srp+350+driver++windows+10
    • http://files.esperanzaxc.net/uploads/1/3/1/6/131606666/xiwomiwokokaf-junupuxowaw.pdf
    • http://files.create-diy-online.com/uploads/1/3/1/0/131069898/7fad07121a.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/636870136.pdf
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/granite_mountain_hotshots_niosh_report.pdf
    • https://cdn.shopify.com/s/files/1/0450/4177/8838/files/urinalysis_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/85100088464.pdf
    • https://cdn.shopify.com/s/files/1/0460/9182/9412/files/vafivutanosalula.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/rebudotonetexipes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/second_conditional_reading_comprehension.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/gezomixopiwetebuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6945/6028/files/banofukog.pdf
    • https://cdn.shopify.com/s/files/1/0437/6605/5063/files/rebakixedufotivuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/business_name_registration_form.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_off00006296.bin
64153272a005e6c76d2192f3514fbcee286412f8ebfa7f94f48e02f6a222edc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 5496 bytes
font_01_sfnt_off00007579.bin
92707d766b652107615d7832d4bd04a054fc95c6de1940f81b3d68067139ac88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 10364 bytes

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