Malicious PDF — malware analysis report

Static analysis result for SHA-256 5937ae458d8265ea…

MALICIOUS

PDF

39.4 KB Created: 2020-08-30 07:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45e5457f337580e15fead11ade279ac9 SHA-1: 383c991168cf450a8ac6de3a5fe38302bbc6220a SHA-256: 5937ae458d8265eada1be4c7101cd0947c48adcbd680ea383ef1e5c5ee649c9a
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 links, with one identified as a malicious redirector. The document body is heavily obfuscated and contains a URL that is likely used for malicious redirection or SEO spam. The presence of numerous links suggests an attempt to manipulate search engine results or distribute malware through a link farm. No scripts were extracted from this sample.

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=is+texting+killing+the+english+language
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/antiphospholipid_syndrome_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/westland_survival_mod_apk_blackmod.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2593/files/8th_grade_math_word_problems_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/34386019749.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e84d85fa70c49ba906df7bf6528ebcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_06d5455927bf4d52b7ed8068d98a2e3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdba102466e944d28201341681839255.pdf
    • https://static.usrfiles.com/ugd/12f4eb_e36b67f9951c4d14a1e35b98ed6eb0ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_00fea06aa38c4ce8bc87f5a3bba3301c.pdf
    • https://static.usrfiles.com/ugd/b0b521_0a7ee6e191044d48b316d8e7196d08c0.pdf
    • https://static.usrfiles.com/ugd/b77b08_56afe24d4cf0455b903a679ac0cb695a.pdf
    • https://static.usrfiles.com/ugd/912de2_3b9022faa6be41e4853bf05b174f25d2.pdf
    • https://static.usrfiles.com/ugd/67f5f7_edae88899f7a49bd99a513b5db9eee89.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_off00005c37.bin
1bc2f5d8b141121b7411432546d67917279c85939a83f8cf9d5d6762b171f9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C37 4920 bytes
font_01_sfnt_off00006cf2.bin
492c5f5d0f15f21aae7de32cc40af717a887f7512dced34fca0ca624ae416d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF2 10848 bytes

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