Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5c592efa386087…

MALICIOUS

PDF

190.5 KB Created: 2020-08-27 20:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eb03fdecf820f46efa0a007cfe54aa1 SHA-1: 7f18c021ce347283101bf1a0ef4f541d73dd2cf9 SHA-256: 7d5c592efa386087d6cec4cc53bade879466197ef1745930b870e55ec58a3c30
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 infrastructure, disguised with a seemingly innocuous keyword. The ML classifier strongly flagged this PDF as malicious. The embedded URL is likely intended to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.club/pify?keyword=biblical+meaning+of+numbers+1-+1000
    • http://subizula.cfohb.org/uploads/1/3/0/7/130739540/rumemeriw.pdf
    • http://files.tabletopto1million.org/uploads/1/3/1/8/131871605/4b8762873.pdf
    • http://files.c3classes.com/uploads/1/3/0/7/130775242/2951292.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/zinakanini.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/vekom.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/vowozixonu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6317/1485/files/tevewuboralutuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/10780112772.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8694/files/cabot_microelectronics_corporation_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/death_note_original_soundtracks.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/how_to_delete_a_slack_channel.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_off0002b56c.bin
14586769f8207d76c12334626c6cb74fbbe31fefe4e2d5525a34f5d0d89df489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B56C 5616 bytes
font_01_sfnt_off0002c879.bin
86755254e6d65513fd81f45020f307f535231ae2bf5c4a2d5b51b6272372e685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C879 10364 bytes

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