Malicious PDF — malware analysis report

Static analysis result for SHA-256 2009cbb709022a8e…

MALICIOUS

PDF

39.3 KB Created: 2020-09-01 01:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b5faf82750ef389479117e510305e93 SHA-1: 763c2c94545853e0415dde2ed761a371c67d18d6 SHA-256: 2009cbb709022a8e42dc9a9a9383ac4cd6c8defe437f581069c78274bcbd1ce9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/wix?keyword=cute+uniform+outfits+for+middle+school', is designed to lure users to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents, suggesting a broader SEO poisoning or content spamming campaign. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent appears to be redirection via the embedded link.

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=cute+uniform+outfits+for+middle+school
    • https://static.usrfiles.com/ugd/02beb7_8798c9ecbddd405fbaa1188681bb3406.pdf
    • https://static.usrfiles.com/ugd/07e02c_5787223095684988b714c39089a0928b.pdf
    • https://static.usrfiles.com/ugd/99965f_3cc156d4ccb541c9b8528739508ee5e7.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/city_of_stars_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/kobijepumisazulataseg.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/neoliberal_education_in_the_philippines.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_aece830585c2400d8a23fcf3b26d6b14.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fa239f3bdb440fdab8ffae0ecfc174e.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_bf3734d84a424e51a51a1083fda7f61d.pdf
    • https://static.usrfiles.com/ugd/c8a981_f08ab341de074b419379c03653f4f2fc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85155057715.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/fuxobuvuvifupuzutaka.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_off00005d32.bin
99d98841fca96750275c45fa56f0fc5d3dd042831a700ec1a2ff5bdc95e3483d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D32 4956 bytes
font_01_sfnt_off00006de3.bin
63782e200c60ccead41296320f2d75cfd3d0bcc760c302d71a7253c2d7d160a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE3 10192 bytes

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