Malicious PDF — malware analysis report

Static analysis result for SHA-256 4649e9a791cd5395…

MALICIOUS

PDF

47.5 KB Created: 2020-08-11 18:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c05e4c9866899cee4df06dff9aa7c5f6 SHA-1: e41d401cc08f30840ae04de782733fd129ce5895 SHA-256: 4649e9a791cd53955fe724965fe4d967e4097c2420593d6e80fc17171fb835b1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=bolzano+weierstrass+theorem+for+set+pdf', which is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites.

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.cc/pify?keyword=bolzano+weierstrass+theorem+for+set+pdf
    • http://files.cuauhtemocmurphy.com/uploads/1/3/2/8/132815367/9f7c14b.pdf
    • http://files.nextlevelsnowboarding.com/uploads/1/3/1/1/131164132/27c2ea9ddc3.pdf
    • http://files.nhlbc.org/uploads/1/3/1/0/131070192/fovubabo.pdf
    • http://files.acakeintime.com/uploads/1/3/1/4/131453574/kepinuvo-turezek.pdf
    • http://files.crypticproductions.net/uploads/1/3/2/7/132712129/faf1b05b71.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/flawless_consulting_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/4508723154.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9487/files/oxford_dictionary_file_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7088/9892/files/rimezokapazu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/11526943382.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/refef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/4781035380.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/pdf_to_word_converter_online_free_download_software.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8592/files/7947699526.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/70229692595.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/xusejutabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/john_deere_955.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_off00005dc9.bin
66d23b3d3adfca7e1d607dcdcd4b15f3b5cdb8b7282eaf734a220855ed16b316
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 5472 bytes
font_01_sfnt_off0000704d.bin
5052a4d027ae8981ff843f925009f9130d31afad203dc100725655973bcad2ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x704D 13104 bytes
font_02_sfnt_off00009ad5.bin
25a32bab6fba71686d7cc74f91b4fdd23b0c39e54c61d5f69321d8d0166b469b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD5 16296 bytes