Malicious PDF — malware analysis report

Static analysis result for SHA-256 99aa14e0f1356a2c…

MALICIOUS

PDF

44.1 KB Created: 2020-08-25 06:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73b8e5299f8f5fe2f017a1bfe741ba4f SHA-1: 19ede7aac2de6d67e75515e697b2502bd49a9212 SHA-256: 99aa14e0f1356a2c445b98f9a132b46f7aafe716545de2cd4aba2daa0dd807fd
128 Risk Score

Malware Insights

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

The PDF file contains a lure, presenting itself as a licensing guide, and embeds numerous links. One of these links, 'https://ttraff.ru/pify?keyword=windows+server+essentials+2019+licensing+guide', is identified as a malicious redirector. The document's structure and embedded links suggest a phishing or redirection attack aimed at leading the user to malicious content.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=windows+server+essentials+2019+licensing+guide
    • http://xejupen.epeterswriting.com/uploads/1/3/2/7/132710779/80e7f6202d.pdf
    • http://files.suelacy.com/uploads/1/3/2/7/132712006/sepeta_levojaso.pdf
    • http://files.forestfest.co.nz/uploads/1/3/2/6/132681452/e9db689.pdf
    • https://cdn.shopify.com/s/files/1/0435/4441/2314/files/55284459712.pdf
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/vefokovov.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/holt_sociology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0459/7265/2199/files/demisufarujonevilajeloxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7581/9927/files/payment_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/zolewibawixod.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/jirexunixekesoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/feruzerofimar.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/fuderumatakuwar.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/carrier_heat_load_calculation_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/beery_vmi_scoring_manual.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_off00006b86.bin
480ad11062c752d844a0284a8c974f85a6da30bac4e42004fe8f551232f058e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B86 5752 bytes
font_01_sfnt_off00007f49.bin
9ba8236f8e7afd458f8db25814674920cf6d201b0761f10d653eedcc2e284538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F49 10456 bytes

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