Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a14ede1ec19fdc2…

MALICIOUS

PDF

47.1 KB Created: 2020-08-30 10:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57757fe05cad4e918a51855c61da5dba SHA-1: 8049d47c8c62ec539969cf790bfeea16a16b89d5 SHA-256: 3a14ede1ec19fdc256fce8757e62519c4ab5c611e7f07d22898d6b2c22625582
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.ru/wix?keyword=cardiac+cycle+easy+notes+pdf', is presented as a lure for 'cardiac cycle easy notes pdf'. The file also contains a large number of external PDF links, characteristic of a link farm, further supporting a malicious intent to redirect users to potentially harmful sites.

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=cardiac+cycle+easy+notes+pdf
    • https://static.usrfiles.com/ugd/8de238_03f57e7441fa42ecb406007890b4def6.pdf
    • https://static.usrfiles.com/ugd/b8c837_09c242601dc44113a5272e24008559f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_81d893d104914a2687a9c730930d7f40.pdf
    • https://static.usrfiles.com/ugd/4cf28d_ac68ffd97ac248afb99794c65efa1657.pdf
    • https://static.usrfiles.com/ugd/b8c837_292b33e770de484aaf91ce4a74933f5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_67e7acd4ca64447d8afb699521dc813a.pdf
    • https://static.usrfiles.com/ugd/c836c3_a9fc839b222a4b2a8ecb2c349601027d.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/48114312985.pdf
    • https://cdn.shopify.com/s/files/1/0436/5379/1909/files/bumaweziw.pdf
    • https://cdn.shopify.com/s/files/1/0460/0578/0639/files/kapegijubufixotoxaxogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/latojodagimasuzinujof.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3755/files/avabel_lupinus_stats_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/bernina_bernette_334d_overlocker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7949/files/71797181241.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_off00006c86.bin
1d3e2365e68798607f26180b36ea29ee4c0200cba20469492afe0a2ac097851b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 5060 bytes
font_01_sfnt_off00007dd6.bin
0cdb0c69b812524fbdb4b05ce10839e98b7266473807acae0863678bc1fa71db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD6 10500 bytes
font_02_sfnt_off0000a173.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA173 4324 bytes

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