Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca2ec14d36f8968…

MALICIOUS

PDF

111.6 KB Created: 2020-09-21 12:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88152b7b52f0e0a1a72133c73d829a82 SHA-1: ad32a596471cd556b97143324de250188a73e2c8 SHA-256: 8ca2ec14d36f89682cc9cfc1f9c507794f8b37cd813adc57c189b1ad9e2f2c49
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.ru/wix?keyword=framaroot+1.9+3+apk'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The document body, though heavily obfuscated, contains a reference to the same malicious URL, suggesting an attempt to lure the user to a potentially harmful site. The 'SE_URGENCY_LURE' heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/wix?keyword=framaroot+1.9+3+apk
    • http://files.bhavini.de/uploads/1/3/2/6/132680808/166401.pdf
    • http://ganerir.anyakunze.com/uploads/1/3/1/4/131407797/670732.pdf
    • http://povopeka.danwalkerwoodworks.com/uploads/1/3/2/7/132740214/xosigagarimodug-tipusikuvu-zopudipisexe-malob.pdf
    • https://4d70a3e8-bd67-4856-b808-18c4973de419.filesusr.com/ugd/008a9f_89c525d340fd4386a0b14baae121b9bf.pdf?index=true
    • https://e1273893-8a9e-49ea-8e0a-45a1ec2cc423.filesusr.com/ugd/0d002d_1b2c694cc951424f88be95865010bb9b.pdf?index=true
    • https://692c34d4-7b48-4bee-8512-4c6ae340c381.filesusr.com/ugd/2ca09c_736ad26498474cf3bf7c93e34316b414.pdf?index=true
    • https://fa35b0da-b279-405a-bce2-0621096c7848.filesusr.com/ugd/c81504_82808500698640e9a0df444bbe7760f4.pdf?index=true
    • https://4322d099-d0b9-4871-898f-54debb286945.filesusr.com/ugd/a467d2_bba2c3ac72b7488e9e632ecc75c73347.pdf?index=true
    • https://c41bf8f8-1b3a-4019-b9d2-9f2e6e07890c.filesusr.com/ugd/6f9b04_a792a288b536487495d25753c5e19d53.pdf?index=true
    • https://0df25c1c-d644-42c3-af30-5bbe8707d317.filesusr.com/ugd/61b8bf_c8118d4af4014ade9b418613f8294d77.pdf?index=true
    • https://dd19c559-5576-44e7-8755-cfec1e8f06a2.filesusr.com/ugd/1a94e8_200f9a07af524caaa4d717287816956a.pdf?index=true
    • https://a6fa984b-0bb0-4be1-b27f-d1a5ea19e9d0.filesusr.com/ugd/5e8de6_dd5ff1e0053048159e7e65e90f01ddfb.pdf?index=true
    • https://2f4b97f4-7da0-4e10-826b-d86c424b2ca9.filesusr.com/ugd/73f3b0_6404d3b6c3ed42e0be57740c4cb778fe.pdf?index=true
    • 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_off00015253.bin
36782942a734c78d5ebd9e306c257daa7accf520a0a010e889770d90fae4ac8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15253 5176 bytes
font_01_sfnt_off000163ea.bin
8a2c41ac1ef900b5ab8a73da628016ddc7589f160d306bffa74dda5a9b6ed6c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163EA 16260 bytes
font_02_sfnt_off000196e0.bin
0784fe86a387f348c0019163cc8fe313b1ce0e9cf262901ab2f055ad4cccb953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196E0 17636 bytes

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