Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08ddbe40d51eebc…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 21:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e365a6bae70ab09b384cc992d0cd80f1 SHA-1: 8f8292dfa5a86b4d6ff04ea5842bc0816192dd61 SHA-256: e08ddbe40d51eebce7074e20b9668c815c51fdb19dedaed1a956559a5db5a2f7
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure for users to click through to potentially malicious content.

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.ru/wix?keyword=the+scrambler+technique+free
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/xesobodovegezuzijuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3081/files/fivutemubena.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/monheim_s_local_anaesthesia.pdf
    • https://static.usrfiles.com/ugd/cc089a_12975332d1934b60be2120fc163e46cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_92488ebecacd42a48bb8969f0ff89d03.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_2dfbcd42f88447e9a8b8f4f8c3f0fc9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2054b899cf84fc094ad39843c379632.pdf
    • https://static.usrfiles.com/ugd/e4ff69_0587ad537eef4d00a8e22f84950d9b0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e552a6c1f93481cbe7628d07a5771c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_096c9ef2c21d4edd99528077ba3309ed.pdf
    • https://static.usrfiles.com/ugd/95089d_b480b1897e5840ab8ecaf9f605a88caf.pdf
    • https://static.usrfiles.com/ugd/b8c837_163e8874deb34935ad4f2c67a3d5db7d.pdf
    • https://static.usrfiles.com/ugd/19103d_796cd3da7b4f402d9bc9c8ede823892c.pdf
    • https://static.usrfiles.com/ugd/58a813_052a87b9a7634bb88a4aa9fc471172ff.pdf
    • https://static.usrfiles.com/ugd/b916f4_e37504be54c040cfbe090cab86ad2b7b.pdf
    • https://static.usrfiles.com/ugd/538d67_94f2698259d54863aff5985b99fea60d.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_off00006100.bin
b4815636b973d93091bb5a6684a5e1e7b3fa86db98122e1a69df5ba9aedb580a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 5336 bytes
font_01_sfnt_off000072f8.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F8 1800 bytes
font_02_sfnt_off00007b85.bin
720d1b7f63858d39fe554da1f7f364a100771e137c2004cbf67a85ffc17cdf09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B85 10296 bytes

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