Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5844d0a1572472…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 13:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e2515346177b5d68301ccb9ced42092 SHA-1: dfa50db240d6b06a1a4233b06e1a1fd92e8b370f SHA-256: 9d5844d0a1572472091800fe1b6658b05b0ae7b3c3d85c90dd00e798c8fc848c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm designed to manipulate search engine results. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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=kolik+stoj%25C3%25AD+gumov%25C3%25BD+mul%25C4%258D+v+dom%25C3%25A1c%25C3%25ADm+sk
    • https://static.usrfiles.com/ugd/269bb8_4285296aa0dd41be862ae5b0310ec60a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7499261b048c48148410d7ed21b63506.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ee06d60f0284a798a6b926a51b6b185.pdf
    • https://static.usrfiles.com/ugd/b8c837_15d987383e264efbaaf12855d5cf5ee2.pdf
    • https://static.usrfiles.com/ugd/f65518_4fa1bef342624077a1bed43649c7e264.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bf73c9469a149e29844297101e16ec4.pdf
    • https://static.usrfiles.com/ugd/9cc572_fb8afba4ac794d0c9a7688b904bce27b.pdf
    • https://static.usrfiles.com/ugd/72b0e7_fd3700a966524897959ba0bda2404b2c.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/zodojesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/9842229493.pdf
    • https://cdn.shopify.com/s/files/1/0439/1901/6104/files/supernatural_season_13_episode_guide_tv._com.pdf
    • https://cdn.shopify.com/s/files/1/0437/6399/0686/files/the_adventures_of_tom_sawyer_full_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_0afa4b2a84a64e9baa824f45f18a3dfa.pdf
    • https://static.usrfiles.com/ugd/69695d_02a75cbbbe104f02be41ccc966c5d1bc.pdf
    • https://static.usrfiles.com/ugd/96768c_85afcdcf84e6426eb54c18b5c8087499.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e529965e6e147beb781697430368693.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_off000071b5.bin
39721b9fc53cc78f540ada1ea25ec66b19b128c933cb366bb3cfe8d01be755fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B5 5676 bytes
font_01_sfnt_off000084c0.bin
084eec89f1e14880a48a58a98fa59ba2200742171be66b85746c9801552e3188		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C0 14692 bytes

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