Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb815c2dd25e9e95…

MALICIOUS

PDF

59.6 KB Created: 2020-08-31 02:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b172436a9ff8c762f4ea312753d238c SHA-1: 2dd0b0e40050f919476c3e4ab341988718d55d4c SHA-256: eb815c2dd25e9e95583ffdab8d78e5bc55088301b4b8f7a7726bd00ac6b85aa2
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 of which point to Shopify domains hosting other PDFs, a technique often used for SEO poisoning or link farming. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=dynaudio+contour+20'. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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/wix?keyword=dynaudio+contour+20
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/dazutiwodemibalaxud.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/syllable_structure_rules.pdf
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/52484107418.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/80970325789.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/41483000117.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/crusoe_had_it_easy.pdf
    • https://cdn.shopify.com/s/files/1/0435/5463/5937/files/21805727619.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/plantas_de_casas_modernas_tipo_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/tipos_de_cilindros_neumaticos.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/bomirebinoxule.pdf
    • https://cdn.shopify.com/s/files/1/0437/0799/0169/files/sulagufudolologulade.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/free_anger_management_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/gewaxubojonema.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d5fbe06370441259d6897b82947527c.pdf
    • https://static.usrfiles.com/ugd/d55797_10a8c763cd2f457eb5cb702cae3f8578.pdf
    • https://static.usrfiles.com/ugd/b8c837_19193ff6550d4515858606cbe454f509.pdf
    • https://static.usrfiles.com/ugd/9eb187_1ac50d85097f40d387d309d77124e939.pdf
    • https://static.usrfiles.com/ugd/21a131_c7c072e0351844bd8bb1f2691a337a84.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_off0000ac8e.bin
85f36000be0d828d6bfe474e47a03a0c0f017dc46a7f98ca837d974d7bc53b2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8E 5096 bytes
font_01_sfnt_off0000bdef.bin
4bae6025112cadbe83b728a3c99cd785b0535d3fb32170fe61120243b64dbb02
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEF 10520 bytes