Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a869e2b44693609…

MALICIOUS

PDF

55.2 KB Created: 2020-08-19 11:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ebe93e481cb5edb6f2d685b2f8d20e7 SHA-1: 84af68f1aef9d618dd0ddee68993a1252466516d SHA-256: 9a869e2b446936090b70b240e01342d034b898a958ec4bc681371f2a554cb3cd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=depreciacion+y+amortizacion+ejemplos+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to depreciation and amortization, likely serving as a lure. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site or download further malware.

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=depreciacion+y+amortizacion+ejemplos+pdf
    • http://files.therapeutichooves.com/uploads/1/3/1/3/131398477/19220d.pdf
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/cents_symbol_alt_code.pdf
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/tofivemojef.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/vivuvixevaruvorewedikumu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/luxitomofobole.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/nojofubufefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/sazosuvurilipixugawowow.pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/zoramugotebaxowifedaleli.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/23516660131.pdf
    • https://cdn.shopify.com/s/files/1/0433/8676/5475/files/48800125476.pdf
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/calisthenics_home_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/ctet_2020_paper_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9992/1315/files/65273928349.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078d8.bin
0b2c3479dbba1196ba6a83cf1d41de36889bb20ad99fc3b7920e90315d1a483a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D8 5528 bytes
font_01_sfnt_off00008ba2.bin
72872e953aaa442982cdeb32cbf8f3e266c1b5d780d89cb612be5d1f3169e535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA2 15472 bytes
font_02_sfnt_off0000ba96.bin
f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA96 16164 bytes

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