Malicious PDF — malware analysis report

Static analysis result for SHA-256 888ea3ef4e2efccd…

MALICIOUS

PDF

211.8 KB Created: 2020-08-09 06:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c096979fd217c3bcc90ef3b864e0ba2f SHA-1: 831690c02aeeb30d3d0e7fb14f179f0998bdbda5 SHA-256: 888ea3ef4e2efccd55055502236619163acb896b72b97000f52b95f1272c4e94
90 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, https://ttraff.ru/pify?keyword=vocabulary+words+for+6th+graders+pdf, is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains this URL, suggesting it's the lure for the redirection. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 2

  • 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.
  • 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=vocabulary+words+for+6th+graders+pdf
    • http://files.southdownmethodistpreschool.com/uploads/1/3/0/8/130813364/xetetuba.pdf
    • http://files.simplycandleco.com/uploads/1/3/0/8/130873741/2873644.pdf
    • http://files.michellemcdanielportfolio.com/uploads/1/3/1/3/131380467/bubusasoxez_lefilenefiv_jodefaxedavuw.pdf
    • http://files.charliecalvert.net/uploads/1/3/0/8/130874205/dalenixedigozuk-sagirejimeba-kasiwigexiju-lixed.pdf
    • http://files.trustableslut.com/uploads/1/3/2/7/132740249/edb811c5b1855.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2711/files/bruker_s1_titan_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/22605601243.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/basics_of_data_communication_and_networking.pdf
    • https://cdn.shopify.com/s/files/1/0444/8436/2407/files/cheddars_menu_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/58682572800.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/berilufufitejutugupig.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/ranekedodibebasotetiwile.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/24504940496.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/90921560960.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0963/files/45187124318.pdf
    • https://cdn.shopify.com/s/files/1/0431/9756/3037/files/xorakozopawuxilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.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_off0002f56e.bin
6ad217737c360f4621261a1f8c8c27252622a6cba7152e5eb8130da99540e6ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F56E 5596 bytes
font_01_sfnt_off000308a6.bin
7381a78f0f1f99a81ed34e8fa61b82174dac78b4d4486b941f8f5c932cc65bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x308A6 13404 bytes
font_02_sfnt_off000332c7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x332C7 4324 bytes

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