Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8bcf50d58462a36…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 23:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 811607e4e3b3b72372b2db7d4766b56b SHA-1: 0e758d82552d8dfb30053f89f4930de27c6adaaf SHA-256: c8bcf50d58462a36fd020fafc03fee5612611c7c5b2b5b7ef6dce54f8b081d4a
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'Solar system gif free' and the malicious URL, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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=solar+system+gif+free
    • http://files.kaitcalabro.com/uploads/1/3/0/8/130813111/7151196.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/jiletav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/23974042744.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/zijisibivitibeviditozori.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/carlos_castaneda_the_art_of_dreaming.pdf
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/2_4_4_engineering_lettering_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0447/9657/5904/files/past_simple_vs_continuous_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/16540904505.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40573574370.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_off00006357.bin
a918dfd0bff58acc42ab77b5d2fd8d66d2724892d584b01bc09454c5a3c51780		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6357 5292 bytes
font_01_sfnt_off00007544.bin
ec4fc8d9b805c47fcff7af223224b165d14e88a14a8a49379f37bb15cf82dd2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7544 9836 bytes

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