Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b474b4f15b34e0…

MALICIOUS

PDF

46.9 KB Created: 2020-08-29 05:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 797efdcda029533d653bc14e7128c054 SHA-1: d8cadb524c6d9451f2b0cda5f4b78f7649fa7ffa SHA-256: 79b474b4f15b34e04c837e16e17c24733de4c45fd8ce43d11baad97238bf3d86
120 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 ttraff.com. The document body, though heavily obfuscated, contains text related to 'dogar aptitude test book pdf free download' and the malicious URL itself. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com, but the primary malicious intent appears to be the redirection via ttraff.com.

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.com/wix?keyword=dogar+aptitude+test+book+pdf+free+download
    • https://static.usrfiles.com/ugd/b8c837_2dfe3cd130d2468e9d7e37d35cffdaf3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ef447bc193c4371bafb0a2d9a1b184d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c1ddc8e80634a4fa6a2434d40bb80bf.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/post_achilles_tendon_surgery_heel_pain.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/toketodajekolibexanuf.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d7761434a5449a08151a7cdeeb9cc05.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d11e7ab723e474db2ac34467a97e171.pdf
    • https://static.usrfiles.com/ugd/b8c837_67fd2dedf2d34e5fb038e6b26d38895a.pdf
    • https://static.usrfiles.com/ugd/b8c837_685f764df56043f5906e98e4183beb37.pdf
    • https://static.usrfiles.com/ugd/b8c837_da2133d936164a218f79a8d2f4a3d882.pdf
    • https://static.usrfiles.com/ugd/b8c837_afdbcacafee24e1ba8b4138dd5587e7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1eb81697ff347718ec98a3c8ebf3ed8.pdf
    • https://static.usrfiles.com/ugd/b8c837_085437aa8ead483f82bd694a5c504171.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
stream_005_off00008593.bin
9155025a293ad5245f4ec6d5355828e2fd077f70ed5955eef80ff2b6ca1357a1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8593 24012 bytes
font_00_sfnt_off00004fde.bin
a4a17817d985955c331da90a527a0b72a98e8fb8cc752631c22ffef7607ad1fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDE 5504 bytes
font_01_sfnt_off000062bb.bin
7ec7bb8b4a3eb7c71eb9bba6aad9438c671b92712640749afeaabf574bd961a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 10188 bytes

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