Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce95d14676f497f…

MALICIOUS

PDF

62.8 KB Created: 2020-08-30 09:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 195d176d1271e188307379ddf2ecc4be SHA-1: 375a464752de8c9f9754456ffb38af6e991edf61 SHA-256: 7ce95d14676f497fdd8cfe111984a0c1820712da0fb89e370be75be85ab8d9d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one specifically identified as a redirector to a malicious domain. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=bangkok+bts+map+2019+pdf', suggesting a lure to trick users into clicking malicious links. The presence of numerous PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=bangkok+bts+map+2019+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0432/2400/6823/files/3633504675.pdf
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/mail._ru_agent_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7154/files/latiruvugijupebijabo.pdf
    • https://static.usrfiles.com/ugd/b8c837_9431dcffb636424b802f7aac8940d8e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_067be260fef9436f9e13c62f45bdbdf1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1786e8a9697c40ec83e66de10965cb1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_07412429a325477597f10d210de4cc55.pdf
    • https://static.usrfiles.com/ugd/a48928_afcb077e0805494f88849707cf183577.pdf
    • https://static.usrfiles.com/ugd/34e21e_cbcdf52a04c34e16aaaf833377eaae37.pdf
    • https://static.usrfiles.com/ugd/15ebe2_fbf6ef0d1b764d5da0b92a78e281da16.pdf
    • https://static.usrfiles.com/ugd/60933b_a0066a7bea94445f98695732e20443ae.pdf
    • https://static.usrfiles.com/ugd/88a84f_bdc537521fd94279a894bd34f44b8ef3.pdf
    • https://static.usrfiles.com/ugd/1849a1_59ee33fcfb644a628615d2b7c8fd5c1e.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/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008536.bin
8574919c7c8a9f024103958ce015253c5a24b8e646cdb5f787658918713f2b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8536 3080 bytes
font_01_sfnt_off0000903e.bin
b225ec7c69b6b14deb5e85f3393353ac1ff004cd87e6e76c70c3a94c081cd95d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x903E 5968 bytes
font_02_sfnt_off0000a471.bin
ab1fbf534f6dcb7cd56c6ede920a9de7a90200094a77b7fb4d8f69a4c10f19d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA471 8268 bytes
font_03_sfnt_off0000bac6.bin
381275ae5d09cc5a87e94b50f3dc4ebf8daa6d3fe7affb0366a956690196b779		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC6 16292 bytes

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