Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d66b8ddd43decd…

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 13:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f2e11bc4818a3429fb95deb3f569bf8 SHA-1: ad49c915408503e718893a92e636fbf196e5971d SHA-256: 41d66b8ddd43decdd09bbf3a9afaba3b0adda27a8f3e9369e542369df388bb58
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains URLs that are consistent with the heuristic findings. The primary malicious URL identified is https://ttraff.com/pify?keyword=baseball+saved+us+questions+pdf, which is likely used to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=baseball+saved+us+questions+pdf
    • http://nekajiru.ribreastfeeding.org/uploads/1/3/1/4/131407406/557a4fea0b0c6a3.pdf
    • http://poris.schrockguide.net/uploads/1/3/1/6/131606201/vazogosa-mevogelekewunun-begupom.pdf
    • http://files.rumidesigners.com/uploads/1/3/2/6/132681910/c8c4f72ace7cf.pdf
    • http://files.tranquilcounselingandwellness.com/uploads/1/3/2/7/132712358/fuzake.pdf
    • http://files.davidgreenlee.com/uploads/1/3/0/7/130776049/3421153.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/free_to_word_converter_download_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/folaberutudeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/node_js_require_path.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/natenojutuwab.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/aqa_a_level_economics_revision_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/5435/6897/files/60271177263.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/runozatuxifurutejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/baruzokave.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/magic_chef_stove_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/41809249572.pdf
    • https://cdn.shopify.com/s/files/1/0437/3698/9850/files/62980106428.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.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_off000075a4.bin
359de4c8403dabd1663f0bdedf2b82cbcc39845a10198d84577576dec6ae7e1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x75A4 5312 bytes
font_01_sfnt_off000087c9.bin
177deda470fc4ae6aff88f9da58856ea46a3d26b43b1882f1ac8cb3c874d50ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C9 10180 bytes