Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd90732a99e84e7…

MALICIOUS

PDF

55.8 KB Created: 2020-08-02 04:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f36360d6f76c053e2dd8cc9f467ff64 SHA-1: 7d1ba7824a5f8f819b7a4167281726c6c89953e7 SHA-256: bcd90732a99e84e7441542b2df7ed7b986521e2df4e5950669b58c495994e0cd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.com/pify?keyword=93+nissan+centra, is identified as a malicious redirector. The document body contains obfuscated text that includes the same malicious URL, suggesting the primary purpose is to redirect users to a malicious site.

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.com/pify?keyword=93+nissan+centra
    • http://files.oheadhra-mackenzie.com/uploads/1/3/0/7/130776254/981dd610e57.pdf
    • http://files.michellexiao.net/uploads/1/3/1/6/131607346/xugex-xotosuzunixovir-kuvareduxifo-fufetatarifu.pdf
    • http://files.islandartandscreenprinting.com/uploads/1/3/1/4/131452824/tolajezumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xagene.pdf
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/gejov.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/57538364299.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/47386127197.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/divulofuzasosukamadifen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/tutorial_guide_to_autocad_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9839/files/pemuvapopux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/velejurivupojuvumu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/4660648945.pdf
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/vodumazasojuwisesononu.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_off000079bf.bin
424655b85961d35276052197cd5e931ed14454df80ef9c3297db9236aa6e6709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BF 4984 bytes
font_01_sfnt_off00008aba.bin
cb40ca67500ab7945ef140ce15db06aa2cb12f29347d33b37a6f0d90d2a66f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABA 15700 bytes
font_02_sfnt_off0000ba83.bin
eb03b7be03687f40be7117bc4e30585f9a5896e11d1bc978fa4268800d78cfc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA83 16388 bytes

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