Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b75e4aa9bfecc6f…

MALICIOUS

PDF

39.0 KB Created: 2020-08-03 09:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6f8defe31741602dd18eb0a0de5d2b7 SHA-1: e02341d84158006be1edb5c481e964f1ce32fa31 SHA-256: 9b75e4aa9bfecc6f497a64b09184d8814f2fb3efe91c56d6aeb3cba31e7ef3dc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, forming a link farm. One critical heuristic identified a link to `ttraff.com`, a known malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=nautilus+champion+gg
    • http://files.burninguptheroad.com/uploads/1/3/0/8/130815437/b8e4d2a228f400a.pdf
    • http://nipozu.ohiostoragestructures.com/uploads/1/3/1/4/131482853/7122576.pdf
    • http://birozixir.lucasmartinsoccer.com/uploads/1/3/0/7/130775436/b158c3471c.pdf
    • http://files.nicolewellner.com/uploads/1/3/1/4/131437474/25056486e6.pdf
    • http://files.signorimanisalonandspa.com/uploads/1/3/0/8/130814258/fivepik-forobuzeke-pefuvipibikeg-gilugonak.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/83124305985.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/pejatujekajupovetijuva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0440/1856/5278/files/python_idle_themes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8726/files/jezetabupo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/316723028.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7598/files/19410411315.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/league_of_legends_ashe_build.pdf
    • https://cdn.shopify.com/s/files/1/0439/2566/7995/files/mac_c_compiler.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.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_off00005675.bin
3424772f84f6a082f06404123c922a40af3cc010bbe03ae0ddb10ff2212ef7bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5675 5220 bytes
font_01_sfnt_off00006819.bin
05f5d912cc11c6ae3ce545a82958ca82c2415cec4233e335b4f26fa6a179be6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 11272 bytes