Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f893d4e5956c4a1…

MALICIOUS

PDF

43.9 KB Created: 2020-09-12 21:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dfba038723ef06ae0c268c2cfe9cf4a SHA-1: 4b999b7b0366a92d18f20a4e1ce4c6d81ccc54d8 SHA-256: 9f893d4e5956c4a19b8d0e25ccf46a4cdf07da60a3f7a0ee6d5aa0956f707d44
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to manipulate search engine results or distribute malicious content. The primary malicious IOC is the redirector URL, which likely leads to further malicious activity.

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/pify?keyword=hypnopaedia+examples+in+brave+new+world
    • https://static.usrfiles.com/ugd/6908d7_2b151ee1c3124ee4801bd5b1c1ed8e3f.pdf
    • https://static.usrfiles.com/ugd/a7074a_251179b8439841f3901db9428ce86af3.pdf
    • https://static.usrfiles.com/ugd/934fc3_a3eef23957dd4fb7a3cb4379bb3b4477.pdf
    • https://static.usrfiles.com/ugd/8b4172_0af43ff663f4494aa3d96dedafccb734.pdf
    • https://static.usrfiles.com/ugd/fd30ac_ff87e95635754481a263f9d6cb729869.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/rimworld_uranium_slug_turret.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0564/files/jisesanozibepokagubetis.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/pemajufubakilufoxosidoma.pdf
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/jafokabuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/length_of_string_c.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/brahmaputra_river_system.pdf
    • https://cdn.shopify.com/s/files/1/0460/3281/4239/files/jogobirapawurokabosakuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/36637292899.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/lomotudafalutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/26116782846.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_off00006bd9.bin
66ef4e574f0f52e88e825f82d040e27751ceabbc89e2d2aaf1658fcfe53716a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD9 5528 bytes
font_01_sfnt_off00007e9f.bin
6bd3c70893809def366eacbcf7d083e0a6f3049cfd665b13eba51ae677216c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9F 10032 bytes

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