Malicious PDF — malware analysis report

Static analysis result for SHA-256 32992b4281103c9e…

MALICIOUS

PDF

62.8 KB Created: 2020-08-31 12:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 006c4eef559c3fe88fa9275c2d10a172 SHA-1: a078781b68a102f231bde9ca5d8c113004879c2b SHA-256: 32992b4281103c9e1778b4c1b6a170ed0cd1d21b63edee5dd294eba25bef4027
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=orikaeshi+japanese+significado+de+ak'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs hosted on 'static.usrfiles.com'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector and link farm strongly suggests a phishing or redirection attempt.

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=orikaeshi+japanese+significado+de+ak
    • https://static.usrfiles.com/ugd/2274a7_8450864db4d6451dab565d9f55c1f85d.pdf
    • https://static.usrfiles.com/ugd/0779a3_6265cc9ff5bf4c62ac702a94ccc5defa.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_0ed595453d594e89b9786989d769b86c.pdf
    • https://static.usrfiles.com/ugd/ee6770_1cce50d037454e61a2a8be6b7e6a838d.pdf
    • https://static.usrfiles.com/ugd/7baf93_82a56b7bbe1748e6aacb837499748d97.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_d71e9b1c91474af38074cddd1f67a0ad.pdf
    • https://cdn.shopify.com/s/files/1/0459/6452/5735/files/jijimaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/14352982751.pdf
    • https://static.usrfiles.com/ugd/b8c837_169ef3c8b5bf44cd98003b3c48c365e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_478ef8dea919480d9464e6ab8d2cf77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbfb65b7e1a24f628eca6b1112a25e08.pdf
    • https://static.usrfiles.com/ugd/c068f8_0fb4fba639b243cb839cb22f1bd03a65.pdf
    • https://static.usrfiles.com/ugd/12f4eb_575d1537766b4ef985f065bfd1b8c25e.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f72.bin
7a40ce00bbbcbf0113dba7c0e59edcfcac5e9b2c2fd0f34bc88a13adcb64e366		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F72 6520 bytes
font_01_sfnt_off000085c7.bin
7e2ff42736dfca0a93ba86216d51806121c536e7b24bb607ab7bc74c2e335ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C7 5552 bytes
font_02_sfnt_off000098a0.bin
780e0e91944bb7d89a293d9afde49de9bd57b6cbdf583cba2330110708015d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98A0 7876 bytes
font_03_sfnt_off0000ae59.bin
09d0877920093d3847ac0aa228ecfa28433d4212265d0e1ccd61dd2822bdeabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE59 11260 bytes
font_04_sfnt_off0000d382.bin
ad0a3b3e093d67bab6d56bce1a3ff2c8269a191f4d058bcd625a1bf70e83a0b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD382 17512 bytes

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