Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b74f8ae2d96514e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-23 17:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689ba993dd336e2124c67485142efafd SHA-1: a0316bac54f3274ff9f8242b20a7ece340c35be0 SHA-256: 9b74f8ae2d96514eb47e4bf5d5c1e5c0aaed37f4facfba987dbfea3da1f5b413
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify-hosted PDF files, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to distribute further malicious content. The document body contains garbled text but also includes the URL 'https://ttraff.com/pify?keyword=cat+creator+android', reinforcing the malicious redirector finding.

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=cat+creator+android
    • http://files.nextlevelgymnastics.net/uploads/1/3/1/0/131070689/766860.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/99461082506.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/33552706527.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/19807016113.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/lipekajepotozoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0881/files/el_interes_superior_del_nio.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/strengths_and_weaknesses_of_utilitarianism.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2994/files/amarula_cocktails.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/81684491057.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/yoga_asanas_and_their_benefits_with_pictures_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8619/2546/files/xuvusijamukugadeline.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/bijur.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/
    • https://cdn.shopify.com/s/files/1/0431

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006393.bin
41227109df8c4455b98732769ed0b82ccd1edab1d6a0295785a6a0c956f6d04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 4628 bytes
font_01_sfnt_off00007352.bin
05cdd16d132ed811d2b535137cee0422925ff26e84ea22bb37b84075b7d35a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7352 10612 bytes

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