Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c3eb35043969a5…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 01:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8369e8a8b98702c8b61a7049256ee09b SHA-1: ed23507e69d4306ed7149fcfbb4c9318f59938c3 SHA-256: 33c3eb35043969a5853d22223e6d2d7910e767b14882e9884ee57f9fc2eec30a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying it as a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=what+does+external+style+sheet+mean', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to Shopify domains, suggesting a potential SEO manipulation or redirection scheme to distribute further malicious content.

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.cc/pify?keyword=what+does+external+style+sheet+mean
    • http://limuxaki.nwaopenspace.com/uploads/1/3/0/7/130739227/2fe9a.pdf
    • http://files.rothesaylaser.com/uploads/1/3/2/6/132696155/motewisakuzavegola.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/3107981030.pdf
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/tabla_ejercicios_abdominales_hombre.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/naviriruwixisakavireg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0435/9376/0931/files/business_development_report.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/55317970923.pdf
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/fonixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/vitufimakivuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5900/3038/files/braun_thermoscan_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/64400783559.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nidosavexurirevinuno.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_off00005793.bin
dbf5307d4113fac4b3fc1d39254387ec80b1c19c1ab765a46582375214d0a0dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5793 5248 bytes
font_01_sfnt_off0000694f.bin
7b0145a6bf6d8906c27bcdc071d8cd908c0af1547b541913c273688a9f19825c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694F 13832 bytes

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