Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b150b851c479e00…

MALICIOUS

PDF

63.7 KB Created: 2020-08-07 20:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d4bc87acc8df87f77f5322487cced8 SHA-1: cdc8be6ab783534d61312d567f1470cd2bf91be1 SHA-256: 2b150b851c479e0094118fb5ac8fea27891d63cf634843d54bdb36f88276b573
150 Risk Score

Malware Insights

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

The PDF file contains multiple links, including one pointing to a known malicious redirector at 'ttraff.ru'. This redirector is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains text related to SEO and the embedded URLs suggest a link farm strategy. The presence of a malicious redirector link and the mass linking behaviour strongly indicate a phishing or redirection attack.

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=search+engine+optimisation+techniques+pdf
    • http://files.southamptonisoc.org/uploads/1/3/1/4/131437306/noxunu_fesusala_mupigebugaja.pdf
    • http://files.frankhagancontracting.com/uploads/1/3/2/6/132681404/zatamutofineve.pdf
    • http://files.momentsbyannephotography.com/uploads/1/3/2/7/132710676/lemuforita_zavedu.pdf
    • http://numalaf.hvesd.com/uploads/1/3/0/9/130969744/butewarin.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/garukorenekez.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/84458547104.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/jidogakawe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/73343819452.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/11450649989.pdf
    • https://cdn.shopify.com/s/files/1/0449/4534/2619/files/old_minecraft_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/84480663283.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/ziredinapiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/51084417105.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/47743238338.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/13533293228.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a374.bin
d7b19ac0648d4564df4901bb58f9072d3f898b5671f3b6c3bba78071600f1bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA374 5648 bytes
font_01_sfnt_off0000b663.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB663 1800 bytes
font_02_sfnt_off0000bef0.bin
784d9215c0b276e985b4359595aab78f0ec3c87c54563ffc0acbc8e20d92ee32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF0 10612 bytes
font_03_sfnt_off0000e32a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 4324 bytes

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