Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d5b85a050e7555…

MALICIOUS

PDF

45.2 KB Created: 2020-08-30 12:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69212cfdf148d58c355b874b12eceeda SHA-1: 45b672307689506e6e78f5fcdd2290785be776f6 SHA-256: 77d5b85a050e7555553e4c42b2da8724ba93c0b74ebee38f5a52c581a50d82ca
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=best+bunker+gta+5'. This URL is presented within the document body, suggesting a social engineering lure related to the video game Grand Theft Auto V. The file also contains a large number of embedded links, many of which point to benign PDF files, but the primary redirector is malicious. No scripts were extracted, and the document body itself is heavily obfuscated, making it difficult to determine the exact payload, but the intent is clearly to redirect the user to a malicious site.

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=best+bunker+gta+5
    • https://static.usrfiles.com/ugd/cac9e4_0b36a200a46d4cf3993426770701206a.pdf
    • https://static.usrfiles.com/ugd/824332_7a6e736ed91c4b04af493ed85144d8f2.pdf
    • https://static.usrfiles.com/ugd/565485_fed166e524bb4ecd80070b33509bb5d7.pdf
    • https://static.usrfiles.com/ugd/99afdc_dac532097bdb4a8e9dc1be12cc01c9c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dbee193a38246b0bb15a597d848abec.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/malewonaxuvusaveru.pdf
    • https://cdn.shopify.com/s/files/1/0434/6488/4384/files/mandrake_the_magician_comics_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofelowuloluvazoriwonub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/nirewaxepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/76885528873.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/wunojufam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/53298890357.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_off0000651a.bin
184fbac4409cb7d0f2c5440f377df2f2371f46fdf48f90dc56a5ff3487ad10c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651A 4924 bytes
font_01_sfnt_off000075de.bin
c38a27c8041ac842a39c85d9f5770307e5983368c12bdc90607e164b3de1ac17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DE 10888 bytes
font_02_sfnt_off00009a76.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A76 4324 bytes

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