Malicious PDF — malware analysis report

Static analysis result for SHA-256 d198a32d0d49f347…

MALICIOUS

PDF

48.1 KB Created: 2020-08-03 18:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f1169b47df8e135cf1e210d5f416140 SHA-1: d81fa3d20f0bd61a14185ea674e1189fa7af7c5a SHA-256: d198a32d0d49f3478accd7cfab46c85898be1b5d250eeaf0c878402091e940c4
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.ru, which is used to redirect users to a page that appears to be a PDF download. The document body, though heavily obfuscated, contains text related to a PDF download, reinforcing the lure.

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=anatomy+and+physiology+of+respiratory+system+relevant+to+anaesthesia+pdf
    • http://files.andersonatataekwondo.com/uploads/1/3/1/8/131871907/2362920.pdf
    • http://files.humandevelopmentzone.com/uploads/1/3/1/4/131438313/8841672.pdf
    • http://files.trinityreformedpres.com/uploads/1/3/1/8/131857199/9578363.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/mekemewovuwex.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/54867085533.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3360/files/abandono_afetivo_inverso_livro.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/ge_refridgerator_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/manuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/levizafop.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/hetalia_axis_powers_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/rawovogudaruk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/tevira.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/809783425.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c34.bin
51e7f83027b41209905631aee3cbe15cd7c86792c8516389643aa16fe66033dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 5396 bytes
font_01_sfnt_off00007e69.bin
7f24ae618175e0d00357d9ffc7d280c87ca3b71207e2f2e421450fe6053e3c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E69 10560 bytes
font_02_sfnt_off0000a273.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA273 4324 bytes

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