Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d6fb2b91cfc17e…

MALICIOUS

PDF

58.4 KB Created: 2020-08-31 06:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccf7ce64e723bd157299df6220dc4a4d SHA-1: c02c2d80338f6891ef34d2a8cdd476a9fb9bcf58 SHA-256: e5d6fb2b91cfc17e831d11ba53e789d027a8aad71650b12d898db296cc0f9983
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to static.usrfiles.com, forming a link farm. One critical heuristic indicates a malicious redirector link to ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body contains text related to 'fourth industrial revolution meaning' which is likely a lure to encourage clicks on the embedded malicious link.

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.cc/wix?keyword=fourth+industrial+revolution+meaning
    • https://static.usrfiles.com/ugd/5e81b9_2351be6619fa483fa3a7924253e06b93.pdf
    • https://static.usrfiles.com/ugd/7598fa_e3b5247be4d441f3b317dcc199202794.pdf
    • https://static.usrfiles.com/ugd/79e5df_b8c8add88b36400e9f95b7d65899c409.pdf
    • https://static.usrfiles.com/ugd/b8c837_29d15258593e44d387c7d55473aceaf8.pdf
    • https://static.usrfiles.com/ugd/628a76_298a251ed3ad485daf36c8afd9291853.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c71c59435294bb49a24a87059cfecf8.pdf
    • https://static.usrfiles.com/ugd/b8c837_94f15a7589ab442185a06ff5ac978955.pdf
    • https://static.usrfiles.com/ugd/b8c837_e41db60785a940b79d36a42069d4c010.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bfba453dce84b34891ef63de4a2a1c4.pdf
    • https://static.usrfiles.com/ugd/3e9e83_190c50ad6e794a188df9c2bff69e0052.pdf
    • https://static.usrfiles.com/ugd/89363e_4e810b3130474bde9a28736bd2002367.pdf
    • https://static.usrfiles.com/ugd/b8c837_607cf5f478734dbaa885c6cc1aadfda5.pdf
    • https://static.usrfiles.com/ugd/4b7290_a58baf23c75346a4bfcb2f3915c444de.pdf
    • https://static.usrfiles.com/ugd/760101_8b13964630aa4c85834eb314880462a1.pdf
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/52704060397.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/xumodula.pdf
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/33043216989.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/xibunem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/53014548783.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_off00009734.bin
9d04e7ef59868de1a9f072aa667929c4bd33921760d0613ebed1e961a75423a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9734 5136 bytes
font_01_sfnt_off0000a884.bin
dba80ac05aac979c5e1898a5f94f992ae7d24bf93c045bb745fc8387cb957f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA884 11212 bytes
font_02_sfnt_off0000cdc4.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC4 4324 bytes

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