Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c75369b276bf38d…

MALICIOUS

PDF

39.6 KB Created: 2020-08-13 22:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 615e6c7e21222ba438fad87d681bb5e0 SHA-1: 20c6f0d73fa6bb5de36f41a369aafffe6668b66a SHA-256: 2c75369b276bf38dfd6e516d0d12c9e70e0a67c4afdbffdefcbbbffb443c91ff
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a keyword suggesting a Samsung secure folder download. This indicates a phishing or social engineering attempt to lure users to malicious infrastructure. The document body, though heavily obfuscated, also contains the same malicious URL. The presence of numerous other links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing malicious content.

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=samsung+secure+folder+apk+6.+0
    • http://files.nswownerbuilders.com/uploads/1/3/0/8/130813768/3211556.pdf
    • http://files.glomhi.org/uploads/1/3/0/8/130814225/3930000.pdf
    • http://files.unityrecordingstudio.com/uploads/1/3/0/7/130739146/1992799.pdf
    • https://cdn.shopify.com/s/files/1/0449/2096/3227/files/7805_voltage_regulator_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/99757956605.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/pexowonilodizef.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5372/files/35299403331.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/phonics_consonant_blends.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/56018118887.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/85403329975.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/87108444589.pdf
    • https://cdn.shopify.com/s/files/1/0429/2716/1507/files/sejogusupevixon.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/52601767745.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevola.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_off00004e2d.bin
0e87c77d30ceb69b7df84493b350e435086f5015ab667b5c120d4b14768e3e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2D 5724 bytes
font_01_sfnt_off00006187.bin
2520d5d5b7aa129a2fd5c3662a4b9246acdb883f9c0caae46d5d5883af53bc81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6187 10012 bytes
font_02_sfnt_off000083d2.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D2 4324 bytes

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