Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4dc4a84ca52db22…

MALICIOUS

PDF

44.3 KB Created: 2020-08-01 22:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ff23c34d35972b03af388d0243ed3c SHA-1: 6f22010145239a4a92d504a79f194ef541af4465 SHA-256: b4dc4a84ca52db223c71d1c19542cadfd8c3e6e9975caa839973b5079f39d6a9
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the string "Cities in pakistan" and a URL that appears to be part of a link farm designed for SEO manipulation. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cities+in+pakistan, which is likely used to redirect users to further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=cities+in+pakistan
    • http://files.abroaddownunder.com/uploads/1/3/1/4/131406211/xeded.pdf
    • http://files.annonautosalesllc.com/uploads/1/3/0/7/130776120/semifinafameguvanu.pdf
    • http://files.gobeyondracing.store/uploads/1/3/1/4/131407796/lozuwineketeb.pdf
    • http://files.gemalchemist.com/uploads/1/3/1/3/131379803/luvarutosuduvusud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/vokep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/resebuzudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3788/files/votusonojuzosubuveganes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/zabataj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/kemes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/knight_in_rusty_armor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/kesidipafemizafozom.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/wiravikunufudusop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6051/0376/files/gorewojol.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/36527414183.pdf
    • https://cdn.shopify.com/s/files/1/0433/6094/4286/files/ganax.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/50222697465.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/12836628008.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_off00007014.bin
80a7b38f204c932d05fb0e3096f9f23caaebc7130c29d8f140147c2e3b5fe1eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7014 4652 bytes
font_01_sfnt_off00007ffe.bin
91ff5573beb393b8e3df6aa606006d5967cf052fef8746ed2b1ec130c7cb4360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFE 10840 bytes

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