Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7023bfcd05c2d39…

MALICIOUS

PDF

106.3 KB Created: 2020-08-14 12:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f28cc1e6e18b9efde76dde95b32eb70 SHA-1: 6a41cf52d11ac5dde9e438601e53965a9cb305e0 SHA-256: c7023bfcd05c2d39a2fd622818c88a4c6be1ade663c1a4dd0fe6ebe75964dfee
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 Shopify-hosted PDFs, forming a link farm. One critical heuristic indicates a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary goal is to lure the user to a malicious site via these links.

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/pify?keyword=zondervan+bible+dictionary+kjv
    • http://files.wendybusch.net/uploads/1/3/0/8/130813841/0e905d219bd.pdf
    • http://files.diagnosingdifference.com/uploads/1/3/1/4/131409309/worufewavuxifija.pdf
    • http://files.irva.studio/uploads/1/3/2/6/132696063/30f756009.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/86658931464.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/misawutofapogeditu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/43986017283.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/jotaburanubozuzuwawatudiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3403/files/bosumiwetowapekuzisemom.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/ruxitomufi.pdf
    • https://cdn.shopify.com/s/files/1/0448/4392/5661/files/79695293854.pdf
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/cambridge_igcse_business_studies_4th_edition_teacher_s_cd.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/ziwovosum.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_off0001674b.bin
639f7173fe2823bd129e9ec759912221f786df08f080624e8673c01302da41e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1674B 5156 bytes
font_01_sfnt_off000178f3.bin
4d04e6eef170250987d8c15d0eccdd1e80bcf0c2b3fb250bbc4daa9d9fc433ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178F3 10284 bytes

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