Malicious PDF — malware analysis report

Static analysis result for SHA-256 f41cbb4e8b0687b4…

MALICIOUS

PDF

48.2 KB Created: 2020-08-09 04:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3deb1d86ac96ee97ff246ce253894773 SHA-1: c574e0e0335bc761e79e6dcb7e398cf46d360060 SHA-256: f41cbb4e8b0687b413de60f16ffaf7f87a2254ee13278512e84683d6d0bbab4a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and a primary link to a malicious redirector at `https://ttraff.com/pify?keyword=aneurisma+pdf+scielo`. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious content. The document body, though heavily obfuscated, contains references to scientific articles and the redirector URL, reinforcing the lure.

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=aneurisma+pdf+scielo
    • http://files.zi-xing.com/uploads/1/3/2/7/132710797/kasenodulo_sawerit_xapemuzer.pdf
    • http://files.shoanlo.net/uploads/1/3/1/0/131070561/kowuladusixevi-buzukavobedeze.pdf
    • http://files.lovebugweddingcars.co.uk/uploads/1/3/1/8/131856398/rutuwaxipite.pdf
    • http://files.sjtcounseling.com/uploads/1/3/1/4/131453565/4544336.pdf
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/chava_book_download_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/87496109658.pdf
    • https://cdn.shopify.com/s/files/1/0443/0246/7228/files/vitamina_c_para_a_pele.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/fagenitedizem.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/80532833818.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49470024852.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/2745852106.pdf
    • https://cdn.shopify.com/s/files/1/0448/7489/1431/files/plasma_membrane_and_cell_transport.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/exercise_plan_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5435/files/5635117873.pdf
    • https://cdn.shopify.com/s/files/1/0436/8780/5081/files/reverse_list_python.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a6.bin
27b2e99dfc5835a2042641cd072c2904aca44929fc3f5578d7455a560e76b51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A6 5288 bytes
font_01_sfnt_off00007b87.bin
644b4f82f30c23a947f14685c0b83ac3aeab70a263872a70ee23913714890939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B87 6532 bytes
font_02_sfnt_off00009101.bin
0059fb63fa6ca3e3e4b30683ce7dde44ed74573e4562000ba778900a39a75f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9101 10060 bytes

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