Malicious PDF — malware analysis report

Static analysis result for SHA-256 8315a4f304eadea6…

MALICIOUS

PDF

64.4 KB Created: 2020-08-31 16:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54690f9542ff37d86157091450229ba5 SHA-1: 4cea30bfdcb3808b85aa7afed3369a5b3d3e8ff2 SHA-256: 8315a4f304eadea6f95c04ca1d7831052bbdb81dd0cfb0f7c3faf63786083492
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links directs the user to a malicious redirector at ttraff.com, disguised with a keyword related to medical treatment. This indicates a social engineering tactic to drive traffic to malicious infrastructure.

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=herpes+simplex+treatment+guideline
    • https://static.usrfiles.com/ugd/921909_aab2124cdde0473e9521a3ebefad7ba0.pdf
    • https://static.usrfiles.com/ugd/3aca14_14da4997a95841b1bbc61c5127763096.pdf
    • https://static.usrfiles.com/ugd/f8de3e_cd505060d82b4e49a5a4bc7c3d92129a.pdf
    • https://static.usrfiles.com/ugd/34ec99_182c7b70c9aa494bb9edd455a5a8425f.pdf
    • https://static.usrfiles.com/ugd/b8c837_92cdfbb591ec40b4a1bec773594c42cf.pdf
    • https://static.usrfiles.com/ugd/b88e3d_4fd26181cd574d2d847dd82015647597.pdf
    • https://static.usrfiles.com/ugd/0286dd_4b766b0e0f6641928f0e9d531e0a3175.pdf
    • https://static.usrfiles.com/ugd/77eba6_58c04cf83b37480dbb73b373665a0ff4.pdf
    • https://static.usrfiles.com/ugd/21e6f2_60ac6a4215ac4b5eb6fc895722762f61.pdf
    • https://static.usrfiles.com/ugd/33a2e4_d777007b6dc54f22a98178d9e513e653.pdf
    • https://static.usrfiles.com/ugd/b8c837_9402a6163e4b41bfb02ef5bd293ab3a7.pdf
    • https://static.usrfiles.com/ugd/74a852_fbdd1db19e06430786b68a723808e8d4.pdf
    • https://static.usrfiles.com/ugd/9904c2_de6de45d7f184d60a5ff7152d99a0495.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3687/files/zegagutak.pdf
    • https://cdn.shopify.com/s/files/1/0439/5070/2750/files/bashar_blueprint_for_change.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/18970446548.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/english_grammar_quizzes_with_answers.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_off0000be9c.bin
424225ba128821607e02b6a677bc0f557864ac33fd2d20502ab4898e308391e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9C 5308 bytes
font_01_sfnt_off0000d091.bin
0dbe848cb373c0b5b18707a4ec3242dcab934022d33f5f5eaf79f87c5463db69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD091 10788 bytes

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