Malicious PDF — malware analysis report

Static analysis result for SHA-256 548f7e1369d7ccee…

MALICIOUS

PDF

37.6 KB Created: 2020-08-10 03:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 967aadedb6f5642da0ad91546216b0f9 SHA-1: 97b6652c15add9ad6b645935c49eb5350bc3c750 SHA-256: 548f7e1369d7cceee3ace568aff820d9b0de6fa31e572fd7fc797e3883dd1746
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL identified is https://ttraff.ru/pify?keyword=algebra+and+trigonometry+for+college+students+2nd+edition+pdf+free, which is likely used to redirect users to further malicious content. The document body contains garbled text but also includes the same malicious URL and several other PDF 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=algebra+and+trigonometry+for+college+students+2nd+edition+pdf+free
    • http://poravo.mrchunsclass.com/uploads/1/3/1/0/131071157/21792845b7.pdf
    • http://favuza.wildelabben.com/uploads/1/3/2/6/132682883/xofakisid.pdf
    • http://files.mrquerino.com/uploads/1/3/2/6/132681452/puviwafexuwa_gakevabewobag_pitimajugokaror.pdf
    • http://kurese.solarcarchitecture.com/uploads/1/3/0/8/130814328/2008794.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/radio_anatomie_du_pied.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/87944312884.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/zufefewubopelajakawose.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/bajelekek.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/16735205517.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/popojubowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/download_kamus_indonesia_arab_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1207/files/supply_chain_management_a_logistics_perspective.pdf
    • https://cdn.shopify.com/s/files/1/0433/8214/5182/files/39846122692.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/naziratovirofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/35797259703.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/estrutura_de_um_site_em_html_tags.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_off0000526b.bin
87a0309f2cf2f929a3e1ed40e3bf6eab7829bec32e49744c2ef6036495894ded
pdf-font-stream PDF embedded font (sfnt) at offset 0x526B 5836 bytes
font_01_sfnt_off00006645.bin
1597b1015db39b236c3d25187e084f917a045513b11d286a127e620fd47420c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 10180 bytes