Malicious PDF — malware analysis report

Static analysis result for SHA-256 313c0ef846ac6bf5…

MALICIOUS

PDF

47.6 KB Created: 2020-08-14 07:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 858e3d64fb48edb05cb9db8cc115cd00 SHA-1: e359f15b45cb795cce188e4f47c4066db7adc1ed SHA-256: 313c0ef846ac6bf513b8aee1a5acf8228b7fec2b154f179b1978dbfe7d65d443
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wb?keyword=bioenergetics%20pdf%20lowen'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links pointing to external PDFs, including one hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and several benign Shopify URLs, reinforcing the intent to lure the user to the malicious redirector.

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/wb?keyword=bioenergetics%20pdf%20lowen
    • http://files.27andoak.com/uploads/1/3/1/8/131856844/6002040.pdf
    • http://files.growyourteaching.com/uploads/1/3/0/9/130969404/4003942.pdf
    • http://lagaven.ringoleather.com/uploads/1/3/0/9/130969985/43b2725a.pdf
    • http://robik.seansschoolofmusic.com/uploads/1/3/2/7/132711991/2987132.pdf
    • http://files.nurturingarrowsdoulacoach.com/uploads/1/3/0/9/130969818/wuwegejibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9202/5249/files/kaguxadeguzatusojepad.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/togajoduxabunitozedetoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/kasexewiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/80826115632.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/2206754618.pdf
    • https://cdn.shopify.com/s/files/1/0431/4726/4166/files/zesedote.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/43576355795.pdf
    • https://cdn.shopify.com/s/files/1/0430/7563/3306/files/chemical_bonding_class_11_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/93913843395.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/javesomira.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_off00006f35.bin
5bd05d9b7783f51acb21bc50d59636bf0fc3401b4a565357cc99af7aad4bd89f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F35 5040 bytes
font_01_sfnt_off0000807e.bin
0df7ec8ecc4a68bfe0e1d12ed6a023848004ae9b7ca6b7eba15dfe3c5e1416c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 10208 bytes
font_02_sfnt_off0000a374.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA374 4324 bytes

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