Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e6650cab6cefec…

MALICIOUS

PDF

40.4 KB Created: 2020-08-25 01:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b4d20dd943b3b46ec8b6cf23cea95af SHA-1: 560bdd89e97d9112ff4c2f1ea18d94d62ea459dc SHA-256: a1e6650cab6cefecfe8609d280829abc660e86c3a63ad04169e5bbf989aba335
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Employment card online' and includes the malicious redirector URL. The presence of numerous PDF links, many hosted on Shopify, suggests a link farm designed to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=employment+card++online
    • http://files.darcyclarke.us/uploads/1/3/0/8/130814387/4258394.pdf
    • http://files.brooklandplace.com/uploads/1/3/0/7/130775431/8464351.pdf
    • http://files.lgbadgeryouthfootball.com/uploads/1/3/0/8/130874254/xowadijodozit.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/granny_invisible_mod_menu_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/zokabesapukipotemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/tau_codex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0434/5846/1863/files/alcools_apollinaire_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/jurnal_ancylostoma_caninum.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/46811682074.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/jinedinenewotofidugipajem.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/9987810130.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/72325684004.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/musedegupepegeduxubewi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1155/4980/files/tezosijuxed.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/lozonivinaximawajelatoja.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_off0000609a.bin
d2b8b74587066162d1073b7fdaf9f494442f25a7449622a720646ffaade206ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609A 5100 bytes
font_01_sfnt_off000071df.bin
93471f529436976cdfcc8c2c9f13539d06774cb752a16d5f5172ec436d6bad51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DF 10248 bytes

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