Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e02417f11e54267…

MALICIOUS

PDF

34.3 KB Created: 2020-08-30 15:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cb8145050b49d01004aa99d3c194cbd SHA-1: 43b8feea098d8c5069b5e1db7c5d4ae970c8b5ce SHA-256: 9e02417f11e54267e8de27fb93cb34f2295d29c515f0ed927f5bacd1246223eb
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to obscure the ultimate destination. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=lange%2527+s+handbook+of+chemistry'. The document body, though heavily obfuscated, contains text that appears to be a title and authoring information, suggesting a lure to disguise the malicious links. The presence of numerous external PDF links further supports the link farm heuristic.

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=lange%2527+s+handbook+of+chemistry
    • https://static.usrfiles.com/ugd/b8c837_2d302c58b5e848bda7b55fa74cc0af41.pdf
    • https://static.usrfiles.com/ugd/b8c837_40eb60b50abe44e692d1f16c1938b99b.pdf
    • https://static.usrfiles.com/ugd/d5cf39_8c9d71eb89ad4f398668e7e9232c7f36.pdf
    • https://static.usrfiles.com/ugd/067ecb_561270baa782449c9151e4c0aaa769b9.pdf
    • https://static.usrfiles.com/ugd/badafb_b5b038442b2e4ddfb888fedcd5999e86.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/40599192166.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/82808892631.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/gemojoxawupinagutazuxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/bufobuso.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/53143592952.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/69286660883.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_off00004797.bin
0828992673c39a64c4e4d0ad0c82e53c5a2138c27e93214f0b1161e2fb41c1d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4797 5684 bytes
font_01_sfnt_off00005ac9.bin
81f04fda71336107565dd50a788a6e0b4bf0d7e5952fd3402b0b3b4917496432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC9 9876 bytes

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