Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb75b7fd930a924b…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 00:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 797cf2ecb6b3abc817fa35d18e5d7ce8 SHA-1: 7da581c6287f66b6792cf230edfd26b518ba4839 SHA-256: cb75b7fd930a924be4d3696e8fc2adfce464d9a62fba181b3293f61a91440a3b
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical redirector link to ttraff.ru. The document body, though obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to a malicious site. The file's structure and embedded links are indicative of a link-farming or redirection-based attack. No scripts were extracted from this sample.

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.ru/wix?keyword=deep+down+we+all+know+meme+template
    • https://cdn.shopify.com/s/files/1/0457/6703/2998/files/20_ejercicios_metodo_algebraico_quimica.pdf
    • https://cdn.shopify.com/s/files/1/0447/3035/1770/files/mesabenuzuxuzo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/31522917519.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8969/files/42653320087.pdf
    • https://static.usrfiles.com/ugd/221f3a_4d0bb2fc046543bda4f3123a6079513f.pdf
    • https://static.usrfiles.com/ugd/1c90dc_373e109410e442eb8db3a8c6384d877c.pdf
    • https://static.usrfiles.com/ugd/32acb1_eb76181a3ca94220bfb5ecdb0bd729e1.pdf
    • https://static.usrfiles.com/ugd/8ab72e_38abf61acf5d4cd58e0ae019be728d57.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bba8d13ded44810878cf5388918b311.pdf
    • https://static.usrfiles.com/ugd/dc98cc_f08ca7bb046046208771211c3ca69b8a.pdf
    • https://static.usrfiles.com/ugd/136d07_83f1178494a94b2eb9801134596433f4.pdf
    • https://static.usrfiles.com/ugd/565485_b3fa23b9d0e7422facc952ca50a90785.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_off00005cd3.bin
5ff5e8a1c2e03f56d8032c63dfe1616c339bb41c199d116a549cef4c492ff9f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 4984 bytes
font_01_sfnt_off00006dd1.bin
49980bd1ea84225dab7737544841122dff9d723559d7262fa11a8954ee77ced3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 10900 bytes

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