Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdda40b3d1c22207…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 14:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dc1ab1b1010c6c11bc958aae4578d78 SHA-1: 9b3c3ec21588a558f261239bacf4f920f1594739 SHA-256: cdda40b3d1c222071f8a78c5d2ecc863c877aa37d81724ddbfdfeca8970d1dbd
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning technique used to distribute malicious content. The document body, though heavily obfuscated, contains the target URL, reinforcing the malicious redirection attempt. 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.com/wb?keyword=ielts%20cue%20cards%20pdf
    • http://files.epictheatrearts.com/uploads/1/3/2/7/132711983/1195739.pdf
    • http://files.anpslibrary.com/uploads/1/3/2/7/132740214/naxidamewosowuvogu.pdf
    • http://kowidi.classnelson.com/uploads/1/3/1/6/131606056/8dab5186a44ff8.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/73271895032.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/5375555206.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/73115490924.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8661/files/nonolivuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/27798947439.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/jet_engine_working.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/72406171571.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/kekozurofadeb.pdf
    • https://cdn.shopify.com/s/files/1/0440/7102/6853/files/brain_on_fire_libro.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/37756934466.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/tarilanepukilunaferaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kitona.pdf
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/61208752863.pdf
    • https://cdn.shopify.com/s/files/1/0433/4862/3510/files/sesirijewi.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_off00006a4e.bin
1d236ba46df47d52c23430be25ea333cfa9973ed0cfdc56f68e45e5eea19ad5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 5088 bytes
font_01_sfnt_off00007ba8.bin
b8cd7fe465bca8e9ce0750dc899c0e9472f6b6e6a285be3eac4124b0779bd422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA8 9924 bytes

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