Malicious PDF — malware analysis report

Static analysis result for SHA-256 e115a0b4dfb3dc0b…

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 23:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad6aae1035213c9df163577b9350cae SHA-1: 992c08c388c8accbc8ae26786527cd2b9d2f0d9f SHA-256: e115a0b4dfb3dc0b27f7c0f1c5f7c870bbdf22cf4797811783743e07a0f4f465
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/wix?keyword=gee+girl+generation+mp3+download+matikiri', is designed to lure users into clicking it under the guise of a music download. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, potentially for obfuscation or to appear legitimate. No scripts were extracted from this sample.

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/wix?keyword=gee+girl+generation+mp3+download+matikiri
    • https://static.usrfiles.com/ugd/8ab72e_01a3e226648b4dc2ae3184f10bcdb2dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_07761a20b169468d989b6dfce4f0a24c.pdf
    • https://static.usrfiles.com/ugd/b8c837_153e1287329848209452019ea5d5b110.pdf
    • https://static.usrfiles.com/ugd/f967ac_10b952d90fa04d4982b1791d745dada1.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/kipusofaxutaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/4119435314.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/60339156816.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/tarewukizodop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9563/files/24307002722.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5425/files/legends_survival_battleground_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0436/2184/3106/files/tegobebo.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d40dc24cf15490eabe94f6c8910c0ae.pdf
    • https://static.usrfiles.com/ugd/6290de_d4be585da2824d199501b0e3773f3653.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_off00004f40.bin
1fe98d2d2cd0b2c9adb94b0e5f23e41f8e304cc4d42c3301bcdbe8cdad68f990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F40 5240 bytes
font_01_sfnt_off0000610c.bin
bacf83956fc04449b289dec3b6d80b5892351f42391f41757c9f1be654bf7417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610C 13956 bytes
font_02_sfnt_off00008c83.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 4324 bytes

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