Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5ace6d6163c966…

MALICIOUS

PDF

48.2 KB Created: 2020-08-30 19:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04a33f2c7c7ef1ccc7af639312a9feaa SHA-1: 19c118ab81a1d5284c08b2682eb1497e7afa568e SHA-256: ec5ace6d6163c96657708a5d1da32ab4e4846ffb3e7b753443578d0f9c9d7536
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for a popular song, aiming to trick users into clicking it. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the link points to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger scheme to generate traffic. No scripts were extracted, but the primary attack vector is the malicious URL embedded within the document.

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.
  • 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.cc/wix?keyword=jay-z+there%2527s+been+a+murder+mp3+down
    • https://cdn.shopify.com/s/files/1/0434/0993/2439/files/1629074126.pdf
    • https://cdn.shopify.com/s/files/1/0439/9320/2846/files/godibokomatujudowome.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/vuwasirijuwugatuzazelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/basisaja.pdf
    • https://static.usrfiles.com/ugd/f46427_228c5173e00c4646a762019944a834b2.pdf
    • https://static.usrfiles.com/ugd/f09a9d_2f972c02e20c4cc8863021a7d6033945.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/90497585584.pdf
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/encyclopdie_visuelle_des_plantes_sauvages.pdf
    • https://cdn.shopify.com/s/files/1/0441/1647/6056/files/zenonia_5_refine_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/7640/0792/files/charge_3_fitbit_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/mpsc_2020_answer_key_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/5379/1909/files/xopirotiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/logositotukuxurep.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_off00006407.bin
566a1786d149408abc5c88df74b58f55d54e300fb41b8ae669547a10f5ec089b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 5604 bytes
font_01_sfnt_off00007707.bin
c7eef515094a79db017c88e28b328aa489babeb4fb24d268bb651cdd88fd4a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7707 15108 bytes
font_02_sfnt_off0000a5a6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A6 4324 bytes

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