Malicious PDF — malware analysis report

Static analysis result for SHA-256 945d6f4c48b42cdc…

MALICIOUS

PDF

41.2 KB Created: 2020-09-13 08:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c54de6e30b1ec9cfe042c07c406f13 SHA-1: b7efa8914e66b665fb47818d33cb3e1d95f339b8 SHA-256: 945d6f4c48b42cdc8b7a6bd77a2be27c6c405ce348ddd67cc9a5186024703005
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure. The document body contains text related to 'Smith middle school cleburne', suggesting a lure to attract specific users. No scripts were extracted from this sample.

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.club/wix?keyword=smith+middle+school+cleburne
    • http://jiledajof.bridgingthegapmovementllc.com/uploads/1/3/0/7/130776255/3278899.pdf
    • http://files.narrativehumor.net/uploads/1/3/0/9/130969385/da430.pdf
    • http://jalegi.exhemplarylife.com/uploads/1/3/1/4/131407995/nunutexaxibiwitusifu.pdf
    • http://files.mylesgrp.com/uploads/1/3/1/4/131409508/51daf47a2693.pdf
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdf
    • http://lizis.msculhane.com/uploads/1/3/1/3/131383613/0f312.pdf
    • http://donowi.roxieriverawriter.com/uploads/1/3/1/4/131407135/1100153.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8080/files/56559277460.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/c_print_hex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/vejeretogavuka.pdf
    • https://static.usrfiles.com/ugd/b8c837_05380624090343b5bca55777ce2fa750.pdf
    • https://static.usrfiles.com/ugd/21b4a7_2f43093fb38f42ac852f19d040fd7432.pdf
    • https://static.usrfiles.com/ugd/e8e253_03a3760919164786b8a6d8bab962fa9d.pdf
    • https://static.usrfiles.com/ugd/de02f3_686359ce8c7a457fa49da44b8ff22918.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_off00005525.bin
f6594627145644f028f0d221e51531f95a9c8231369ba9e4b37917a9cb655dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5525 5092 bytes
font_01_sfnt_off00006642.bin
735012cea97e7b342e51ec8fb515134df5e5904174cc0b44cfab8bc1e38b8374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6642 10468 bytes
font_02_sfnt_off000089d3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D3 4324 bytes

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