Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4ea1ba38c43251…

MALICIOUS

PDF

64.7 KB Created: 2020-09-06 15:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49500a2c224d35e7b4bb1a3183df191e SHA-1: 1f970158053e44322686279c0cd8c2698a5b06a7 SHA-256: 4b4ea1ba38c43251cb8678dd2119e86901140369d50ca8b017a745c227a36fd5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.me/wix?keyword=information+about+primary+memory+of+computer'. This indicates a phishing or scam attempt. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The file also contains a large number of embedded links, suggesting a link farm or SEO spam tactic to distribute malicious content.

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.me/wix?keyword=information+about+primary+memory+of+computer
    • https://static.usrfiles.com/ugd/5f5755_7e4e2d761c02462492f7645bee0d1565.pdf
    • https://static.usrfiles.com/ugd/6c313a_bf802f38d25a43bea45aec9631a3e00e.pdf
    • https://static.usrfiles.com/ugd/2eedf1_2e6610a2a21c4303b1893153f0f956c6.pdf
    • https://cdn.shopify.com/s/files/1/0429/2696/4903/files/muzujetowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/java_programming_language.pdf
    • https://static.usrfiles.com/ugd/3db607_ea6a56630bb14918b192f05ae75e0037.pdf
    • https://static.usrfiles.com/ugd/3826db_e76329a8af8549f190d64c912e8eaa4b.pdf
    • https://static.usrfiles.com/ugd/ee6770_42054db39e2544319ae518dc383f950d.pdf
    • https://static.usrfiles.com/ugd/a44510_cfb0a59093bb41f1815c3dd1d5c47642.pdf
    • https://static.usrfiles.com/ugd/ea2f88_a098cac393794f7091491e76dd3851e3.pdf
    • https://static.usrfiles.com/ugd/ce14f3_45ac8403510e46feadcd308bc9060848.pdf
    • https://static.usrfiles.com/ugd/843280_40db4da24e91484a9a391db536b5159e.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_off0000a92f.bin
faeb2c0617818349b615611ff7dad817c8defe9acd8819f00ba62385b06d6922		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA92F 5012 bytes
font_01_sfnt_off0000ba1d.bin
69ff17cbd9b7b55e6d1df34c5e066db3642da924eaaf48352886b96756247f87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1D 14524 bytes
font_02_sfnt_off0000e780.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 4324 bytes

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