Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3027b71071550a…

MALICIOUS

PDF

41.1 KB Created: 2020-08-11 19:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf5ce75aa3fcf2b0aee8404ca392c9a0 SHA-1: 55a01e5b30aa32969bcd57c9416bdbe46d9d7975 SHA-256: 3b3027b71071550aec8a6813ddd07d397c12f5b8df2baa6ecb39490e024008b8
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF titles, suggesting a lure to disguise the malicious intent. The primary goal appears to be redirecting the user to malicious infrastructure via the 'ttraff.cc' domain.

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=bacteriolog%25C3%25ADa+clinica+pdf
    • http://files.oceanstatefollies.net/uploads/1/3/1/4/131453021/dejufotibix.pdf
    • http://files.pinchaschemsite.com/uploads/1/3/1/6/131606491/vatowago.pdf
    • http://files.confidentlyuare.org/uploads/1/3/1/4/131437131/jifemexukutorop.pdf
    • http://files.fancycanary.com/uploads/1/3/1/4/131438453/6224309.pdf
    • http://suzek.rosabransonandtheworlingtonmovement.com/uploads/1/3/2/6/132695306/fiwipezotepewireraxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/47293158532.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6135/files/star_wars_aftermath_espaol_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5586/5243/files/81331256399.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/sufixagalusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8829/8659/files/jagevujadupazogubifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/faruburobesejosisugewabu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/funajotatobobipikede.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/xomirido.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/45559301621.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/zoretowanoranapagifawaxo.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_off0000600f.bin
53e89c2a25f3ff165a80ee0748122ae549a69decfae25c4d9ec125d2acc4729d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 5248 bytes
font_01_sfnt_off000071f7.bin
120a85d85a2013854b94ed8cb0a57b6835bdeee7c39748c9809c798102b216fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F7 11004 bytes

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