Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37685cdb923c245…

MALICIOUS

PDF

46.1 KB Created: 2020-08-12 00:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f7aee6287dd051ba91900525b4d9a15 SHA-1: c0e9f0b535f75754b185e5e56460d509d717b2c2 SHA-256: e37685cdb923c2456f355b87abcaa9c6d4ece757d13813415674e0c2b32505e2
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Berlitz japanese in 30 days pdf' and includes the malicious URL, suggesting a lure for users interested in language learning materials. The presence of multiple unknown URLs hosted on various subdomains indicates a likely attempt to distribute further malicious content or phishing pages.

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=berlitz+japanese+in+30+days+pdf
    • http://woniku.holly-west.com/uploads/1/3/1/8/131856772/8c2c8223a4f.pdf
    • http://fipeson.jtowncoffee.com/uploads/1/3/1/4/131452903/9964171.pdf
    • http://files.bajananda.com/uploads/1/3/0/8/130813765/lominuso_tozir_nowabo.pdf
    • http://zokab.vohrart.com/uploads/1/3/1/4/131483281/gurenijuva_sidirupibamoji_dobemomafowuv_vaxazeton.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/ruwunojuxeralub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8013/8398/files/ccnp_switching.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/68429033608.pdf
    • https://cdn.shopify.com/s/files/1/0441/3492/4440/files/26232553509.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/xelelojavatutikok.pdf
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/sunrise_sunset_boston.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/fokafizerizomazisofawelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53975554289.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/maremu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/60015462673.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/26127944639.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/construccion_de_carreteras_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0436/8872/2597/files/jejagemuvil.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_off00006891.bin
b62eb467f76d5b20913b5d2fa6ed2ca939ee540d3642d682d02e9a986d9a0c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6891 5620 bytes
font_01_sfnt_off00007bc6.bin
5a2ef6f7aca61136f89efe23a48570213cb4483a07f6fc5243f0840affd492ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC6 15388 bytes

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