Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93d5b88af330ab1…

MALICIOUS

PDF

46.5 KB Created: 2020-08-29 22:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eb3a00862bf2836859471d59cc0385b SHA-1: 2087dd222bb4a38f786a8e95a3d20b7c3e2fa56d SHA-256: b93d5b88af330ab1783e365336d15886a0f68b26a8ce973f0bdf4b86ad9fb668
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external PDF links. One of these links, 'https://ttraff.cc/wix?keyword=d+link+dwa+552', directs to known malicious redirector infrastructure. The document body contains obfuscated text and embedded URLs, suggesting an attempt to lure users to malicious sites. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=d+link+dwa+552
    • https://static.usrfiles.com/ugd/b8c837_14123bb2b7df4f5b8bded97bc6a65de2.pdf
    • https://static.usrfiles.com/ugd/b8c837_060f67faf6074162b371c8e9907f299d.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd2ae9ae8ce14bfdb84d20c21b217453.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/vadozomujenukeburizo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/healing_herbs_and_spices.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_ec8d8a79b2f943c9be66deadbd9ab929.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbc05465ae0a4ac48cead0826860b0c9.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/pejakadepovugodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/arduino_interrupt_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuvororixepexovi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000547e.bin
b8a1e1868d1c3cd88dab68723157996e1bb6c068dffce15d83fe56a613d16d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x547E 7612 bytes
font_01_sfnt_off00006e1d.bin
5266bea48491df0f32ef57ace773749e98b29ed41b5d6f312e32d2722f493831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 4436 bytes
font_02_sfnt_off00007d36.bin
ae6c0ad849f7f5649b5b1bb74cd28acae520be96467f0e986ecebddd57435529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D36 9916 bytes
font_03_sfnt_off00009f22.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F22 4324 bytes

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