Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0d5a452d22ed43…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 05:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7781f9b9971cbc37313854f0abac8a54 SHA-1: 7028648a18abd78e8d396ff880d5f551a42b6365 SHA-256: 8a0d5a452d22ed4348fd47b66dc5c8c2dd7ba1b1d35218f39a27d09c35691452
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.link/wix?keyword=dombra+remix+indir+dur'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://static.usrfiles.com/ugd/3be3a7_3de341282d4e446398a5ad95c5681c11.pdf' being one of the first identified. The document body, though heavily obfuscated, also contains these URLs, reinforcing the malicious intent of directing users to potentially harmful content.

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.link/wix?keyword=dombra+remix+indir+dur
    • https://static.usrfiles.com/ugd/3be3a7_3de341282d4e446398a5ad95c5681c11.pdf
    • https://static.usrfiles.com/ugd/1cfe37_47a816b88e3e4540a5e3655fd1d210d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1084a64bd8f34b3bb5be5b58ab6427ce.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_eeef22d479e04f2d8cd62bd1a8d1ebef.pdf
    • https://static.usrfiles.com/ugd/a4d998_79a1bc04000549848a1aeca2dfd7d534.pdf
    • https://static.usrfiles.com/ugd/4117a9_f4f3ef5c2868445a8f4885ceee2871a7.pdf
    • https://static.usrfiles.com/ugd/54fa57_53ed0bb4d96c4d53ac7d35ea9c0cf20f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2eb74ee01ffb4d5797178ceddf219e70.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/free_translation_of_from_spanish_to_english.pdf
    • https://cdn.shopify.com/s/files/1/0447/7576/8221/files/auriculotherapy_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/sufozove.pdf
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/xoxuvov.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/63519541878.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf60f71e75e84616866dc899ae96b425.pdf
    • https://static.usrfiles.com/ugd/b8c837_aca4c2f294084a67a36027cb9138f938.pdf
    • https://static.usrfiles.com/ugd/a467d2_f6038d979774407f9b645252148b1e9d.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c9c.bin
edb879179b1e464f7bc9fae20d19ebb0986f90f28db1106eaa3b5b242aed6ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C9C 2860 bytes
font_01_sfnt_off000056c6.bin
96dccc2dc0b87d6a8a6e3166d9f58d6a15303cd20c47ba5defb7e908255ed940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C6 4968 bytes
font_02_sfnt_off00006791.bin
31c5e79d5ffb7c3d36315cdca09f58be8d8c594e7b507539ee1ec3f33ef56399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6791 10660 bytes
font_03_sfnt_off00008bae.bin
660d05b38fea380e8cc13f4a5a7db764e9bd2a20a73145a73af50c118749f22b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAE 16060 bytes

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