Malicious PDF — malware analysis report

Static analysis result for SHA-256 528f37eb346b3def…

MALICIOUS

PDF

47.9 KB Created: 2020-09-09 08:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792149c7d0d9b1687dcfe4514e0e5102 SHA-1: 95cf532dab1b81cc52df16647f698002c5f892ec SHA-256: 528f37eb346b3def698ccc91750895752afbf86bac309e1c0192b8af720d2b2a
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 external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=crontab+entry+format+in+aix', which is flagged as malicious. The presence of numerous links suggests an attempt at SEO manipulation or a link farm to distribute malicious 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.me/wix?keyword=crontab+entry+format+in+aix
    • https://static.usrfiles.com/ugd/078c79_c9cb2e6fec6e40af8f110431cc143969.pdf
    • https://static.usrfiles.com/ugd/8de238_35a95467ff68403b9ce20ec33ea37ac4.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_db8ae8a2822346f4836f123e4e2e287a.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_32134a2a4a6046a78f075fe8210f41c1.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/60669744178.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/26774660668.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/city_domain_cleric.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/34343973146.pdf
    • https://static.usrfiles.com/ugd/bfbc46_4ce727647da24867a3477b81bed2fcea.pdf
    • https://static.usrfiles.com/ugd/429b25_648fd13421004b92a6820b26ca4d358d.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_08571db7b7eb40a58f479901a1fe1024.pdf
    • https://static.usrfiles.com/ugd/37428b_f27246914dda4a89bb0720b0f1bf48ac.pdf
    • https://static.usrfiles.com/ugd/4d400c_a00a4e613d02448ca6941b9072da818f.pdf
    • https://static.usrfiles.com/ugd/6812d7_dd92edc2762d4e7393961bc19be2bc2d.pdf
    • https://static.usrfiles.com/ugd/82e28d_e080abf3d513423fb68886c9dc386e0e.pdf
    • https://static.usrfiles.com/ugd/19ce5d_a9d709917843491398c0b8eb6383d136.pdf
    • https://static.usrfiles.com/ugd/36f25b_a93d326eb3ee433ab573b3fbd189792f.pdf
    • https://static.usrfiles.com/ugd/73c254_0318442286f84709a6a60d1dfc674e9e.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_off00007065.bin
05ff5f830a5240fdadd161d7731df5eb895a2bd9e0cbf8430b55d6e8e4fd0a0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7065 4824 bytes
font_01_sfnt_off000080bf.bin
b436ba82ed4f44c31efe7c83f507b912c5c12770daf519998bb8a89472cb7dde
pdf-font-stream PDF embedded font (sfnt) at offset 0x80BF 10468 bytes
font_02_sfnt_off0000a4a2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A2 4324 bytes