Malicious PDF — malware analysis report

Static analysis result for SHA-256 1babe1faee762e09…

MALICIOUS

PDF

36.0 KB Created: 2020-08-31 06:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c60edc4e12f7798bf446339305c2e40 SHA-1: 6bbb97dd4314d38d6a4821c9dacc5e408797b3df SHA-256: 1babe1faee762e096638e93b2081d620fde004fef4da7be6c798c722c2394dd0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate a PDF link farm, likely an SEO spam technique to drive traffic to malicious sites. The document body itself is heavily obfuscated and contains the malicious redirector URL, suggesting the primary purpose is to lure users to external, 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.ru/wix?keyword=cervical+dilation+visual+guide
    • https://static.usrfiles.com/ugd/e3834b_c8d0355816c2415ca742eaea3d6f59b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f5ba125a79c4493881924967ba8e647.pdf
    • https://static.usrfiles.com/ugd/b8c837_e36b7e4a920346da937485d9921a63db.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/3129590491.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/wefex.pdf
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/23131000526.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/45210023455.pdf
    • https://static.usrfiles.com/ugd/5438e3_71606602878d4e478f7d944e1d529946.pdf
    • https://static.usrfiles.com/ugd/b8c837_df63b85fd3264a9bbd3d9676ca701a0a.pdf
    • https://static.usrfiles.com/ugd/191a6d_f9c31245916d4f1fa8e472b7c49e5ae1.pdf
    • https://static.usrfiles.com/ugd/b91566_e2fbee3da2db4552b360d8b1b6a52a1a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/13047067608.pdf
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/mii_maker_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/sinezisevagetigajifuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/suwubawetiborugafu.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_off00004fff.bin
66ac5b0af1d01812140f82f887a276578b45a956a02154e3597c1fb5ad2acaf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFF 5072 bytes
font_01_sfnt_off0000614b.bin
c5bd9e81b8a6eb3f6e8f4d4533e8854f73363ade23bed9e66b0550cba58309ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 10172 bytes

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