Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70ca71dcf9464e5…

MALICIOUS

PDF

53.4 KB Created: 2020-08-21 03:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54532165d077bf3b4554e98234c77e26 SHA-1: 6b8f5a5c84957ce7f2e5793b5170eda9fba10baf SHA-256: c70ca71dcf9464e5ea091822b393fd459ee64fb86b047381f27f430dff572387
120 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=musica+joao+e+maria+chico+buarque'. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of a PDF link farm heuristic further supports the malicious intent of distributing links.

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=musica+joao+e+maria+chico+buarque
    • http://gofim.gracespacestudio.com/uploads/1/3/1/4/131406390/5852546.pdf
    • http://maweweri.ninaswarriors.com/uploads/1/3/0/7/130739732/xivutep_jivifadajapa_vugewebojebomit.pdf
    • http://dapawoje.helioshk.com/uploads/1/3/1/1/131163635/parutubid.pdf
    • http://files.millerpac.com/uploads/1/3/2/8/132814518/da7d963.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/29083357562.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/davolawuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6670/files/vukakigexibititojofujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1955/0370/files/9593194505.pdf
    • https://cdn.shopify.com/s/files/1/0436/9468/6376/files/21589407613.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/65634794182.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/ncert_biology_book_12.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/21991252053.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/29160473821.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/70671165950.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/49788093868.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/30500497997.pdf
    • https://cdn.shopify.com/s/files/1/0428/3102/0198/files/61714308420.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_off00008770.bin
a2fd761b987c21276e921162af83fdd7511215f4f6feb5657d4a2904f4881d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8770 5352 bytes
font_01_sfnt_off0000998d.bin
367d9b7be05cc16d0dbffaf56fe61ce8621bdd49e5c54100defeec2abc2c96b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x998D 15740 bytes

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