Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b7b0f451beb390…

MALICIOUS

PDF

51.4 KB Created: 2020-09-01 09:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d2e69571361b312e9836b8410a22c6e SHA-1: d0c5a0fc9a324cbc1b6fd75f34cf6514ecc36086 SHA-256: c6b7b0f451beb3908360fa8000a1e037d5cb684080c828209c95c98b3eb90f00
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=home+care+business+plan+template+uk'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign content, likely to mask 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/wix?keyword=home+care+business+plan+template+uk
    • https://static.usrfiles.com/ugd/c0fca2_2aa7c301618e421098f6b5094ec51641.pdf
    • https://static.usrfiles.com/ugd/b8c837_c93680be0c0b429e94243db76bad95db.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_d6ad750ee01b4d87b5b65dbcd3c53652.pdf
    • https://static.usrfiles.com/ugd/227d0f_1a20925099e548b39b3022d5151e9349.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e146d0eb4fd48cd9c641ffc48614c7a.pdf
    • https://cdn.shopify.com/s/files/1/0436/2518/5442/files/bundle_of_sticks_story.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6253/files/72428358260.pdf
    • https://cdn.shopify.com/s/files/1/0437/3390/9665/files/tiredanaselutilewipawe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/38590402050.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/23445873538.pdf
    • https://cdn.shopify.com/s/files/1/0463/0672/1957/files/iconoclasts_were_opposed_to_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/systematic_error_vs_random_error.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/67857969441.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/68593466899.pdf
    • https://static.usrfiles.com/ugd/b50c55_b34cd86253d24b10b9b80d4220de97dc.pdf
    • https://static.usrfiles.com/ugd/98857b_1877c8a1c5654c0b882d6a8bc2124d19.pdf
    • https://static.usrfiles.com/ugd/e3325f_3b9eec122cb44037a5a1a2df72e82d05.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_off00008b16.bin
1ab9d795c4aa5173c519c1a1f0e57ca1078db6c1de2045c490db6ccc5b18c598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B16 5244 bytes
font_01_sfnt_off00009cc8.bin
28ae731c61ba71ad55d83dfe4396f4fb72acdf3523d525e663ddd70e90805f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC8 10528 bytes

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