Malicious PDF — malware analysis report

Static analysis result for SHA-256 213f4ece2f43a7a9…

MALICIOUS

PDF

51.8 KB Created: 2020-08-22 00:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b358bcd59445924978a833836b96fe2 SHA-1: 0f21b9f3132442fb82ce620778699b7db7f9da0f SHA-256: 213f4ece2f43a7a9c930f726379039739b86542b90745d59ebd191ab47d3977d
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector link disguised as information about free antivirus programs. The primary malicious URL, https://ttraff.com/pify?keyword=best+antivirus+program+free, is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, reinforcing the phishing attempt.

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.com/pify?keyword=best+antivirus+program+free
    • http://files.soapbarlounge.com/uploads/1/3/0/7/130776718/luriza_bokitewakikizu_sepipe.pdf
    • http://files.bdwteachers.com/uploads/1/3/1/3/131383949/nukitigibiko_guxexajewiw_popeki_maluxamebemobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/effective_advertising_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/22552356032.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7311/files/79401201646.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/guxame.pdf
    • https://cdn.shopify.com/s/files/1/0435/2249/0532/files/pisididekomuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/sakef.pdf
    • https://cdn.shopify.com/s/files/1/0438/5102/2501/files/negapus.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/sobes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4346/3074/files/gokuwelataxasasegixuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/incarceration_nations_baz_dreisinger.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/anger_management_techniques_worksheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008bff.bin
363a029ce7ab0248108f5055681c6b1a12a9c15f164adff604fbe5fbed285811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFF 5300 bytes
font_01_sfnt_off00009dfa.bin
e86cb03f6bf4da8ed444d05e573159e646c085161165af2508f73143df32cb68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFA 10704 bytes

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