Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16abdcf51c9f884…

MALICIOUS

PDF

84.4 KB Created: 2020-08-30 02:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecfa19467b1ddc3ef660b2e67490e8fb SHA-1: 6ad9c2f6a3c3523a8e23013684e36f39e067465c SHA-256: c16abdcf51c9f8849d0a086c9ba59291dd4a9fc914019efdcaba6b215b7ca7c5
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The embedded URL is reconstructed as 'https://ttraff.com/wix?keyword=atmega32u4+programming+manual'. This suggests the document's primary purpose is to redirect users to a malicious site, likely for phishing or further exploitation. No scripts were extracted, limiting the analysis of the exact payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=atmega32u4+programming+manual
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/tweaking._com_windows_repair.pdf
    • https://cdn.shopify.com/s/files/1/0434/6557/2514/files/75318571040.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/aryzta_annual_report_2018.pdf
    • https://static.usrfiles.com/ugd/b8c837_396a42f591524d1b83156bef42351dca.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/baloxovevipe.pdf
    • https://static.usrfiles.com/ugd/bfbc46_d4b31047a5ef4071a5534f0d46d6a103.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aa89042ee9c41ecb5901bec76370f92.pdf
    • https://static.usrfiles.com/ugd/ae15ca_6cbcfb9bec47469cbfd37587c2b057bf.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_off00010427.bin
221b06ca1083c3146ebf284eefc8ae64af6d9b0dfe834fc5fe1eb24b434691ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10427 5332 bytes
font_01_sfnt_off0001163e.bin
94028a1ad9b4946020abd5c3dd2ed725f48f853d84979d552eb11007273c9b4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 14908 bytes

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