Malicious PDF — malware analysis report

Static analysis result for SHA-256 117cb11e4c626619…

MALICIOUS

PDF

37.4 KB Created: 2020-09-01 21:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca191953a6f2ad4b89b7e3248e3909f SHA-1: 9904788fb24c3ca41c1f311f6a160f25b9e79894 SHA-256: 117cb11e4c62661912a989f797036697bc6a15afd6edcf20e55a52565b2d2eeb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a 'Codycross answers' document. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The ML classifier also strongly flagged this PDF as malicious, reinforcing the assessment of a malicious intent.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=codycross+answers+group+4+puzzle+3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/097bd5_6ae36f82328b4a4ea2e33ab615b1f6f2.pdf
    • https://static.usrfiles.com/ugd/b910ae_6b517fc3ed424e70a96725cbb02fcbc5.pdf
    • https://static.usrfiles.com/ugd/66c878_dbb51617a4e64ce38aec69cc8bc962ee.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/lifewowexowamiruti.pdf
    • https://cdn.shopify.com/s/files/1/0433/4714/8950/files/charles_law_chemistry_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/22305962769.pdf
    • https://static.usrfiles.com/ugd/7f929b_e1d7148114a94a5f816a332d2dad198a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a58955b17278475283872132fe14e640.pdf
    • https://static.usrfiles.com/ugd/fd3290_53bbc2c318944b7b89c03174fafb4d29.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000531d.bin
6121d7bdfd4274260817ab902b5b5ab73cb8ab225b9f0b06e2debd34f54d4ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x531D 5644 bytes
font_01_sfnt_off00006691.bin
e00cf7ee430da79733b521eed7109c066a28f0079406fbd437a686d1babc52b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6691 10112 bytes

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