Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac88b20a8f193e2a…

MALICIOUS

PDF

43.4 KB Created: 2020-08-03 05:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0c834397f51e29e6ddd57ba3e3ca224 SHA-1: c5143b0746ddce797b0002c64d6fc34781f2c9bc SHA-256: ac88b20a8f193e2a60e68ceeed745f987be16a495f08502e7c77de58c67e5230
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a technique often used to redirect users to malicious websites. One critical heuristic identified a link to a known malicious redirector, 'ttraff.com', which is likely used to obscure the final destination. The presence of a link farm further suggests an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the PDF structure and URL analysis strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=borderlands+pre+sequel+athena+heads
    • http://duxuniv.marthatorresfoodstylist.com/uploads/1/3/0/8/130873822/bajasodemisudi.pdf
    • http://files.camiebianchi.com/uploads/1/3/0/8/130814644/b6a46651c25.pdf
    • http://files.heartofavalonia.org/uploads/1/3/1/8/131871569/nepovewaralefut.pdf
    • http://files.bacdox.com/uploads/1/3/1/4/131453847/aac8a3b6dadcd.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/windwalker_monk_pvp_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/81484355309.pdf
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/bajokagedimosabuluj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42386580717.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/19796470490.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/segoruruduzokamaxuxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/latoya_francois_sentencing.pdf
    • https://cdn.shopify.com/s/files/1/0433/3004/4062/files/60261260036.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/futumen.pdf
    • https://cdn.shopify.com/s/files/1/0438/1510/8765/files/85088983294.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/rimivitomanodefo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4277/3914/files/papumusadesisiresovajoniz.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_off0000633c.bin
8ad73ec6a330b4a0d58329a8ad8d7440418291ccc59ee6c4e25bd0ba83196828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633C 5224 bytes
font_01_sfnt_off000074f2.bin
4380cac0cee84700e2bb7293c2a414a44c16fbd24731ee8696ac9f75290563d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F2 13744 bytes

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