Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e354a183c1c07c…

MALICIOUS

PDF

56.9 KB Created: 2020-08-23 02:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dcd36de13556e9e7d9ca88de9721887 SHA-1: 82e3a8eb7a346be36dbc118fe3d2db2fd51e3464 SHA-256: f3e354a183c1c07cabe4e879e1e581eb58e387dfe84217cd0d69e2f6a2c3bd87
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a driving test PDF. The document body also contains numerous links to external PDFs, many hosted on Shopify, likely as part of a link farm to improve SEO for the malicious redirector. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=driving+learners+test+questions+and+answers+pdf
    • http://nakopaduj.steve-freeman.com/uploads/1/3/1/3/131380600/tiverarilan.pdf
    • http://weziju.markpinder.org/uploads/1/3/1/0/131070197/7582700.pdf
    • http://files.parishofhoylandsaintandrew.com/uploads/1/3/1/4/131438741/xivajesenam_kizagowo_poniwonaluwiw.pdf
    • http://files.elizabethrk.com/uploads/1/3/1/4/131438639/gitisul.pdf
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/the_bodybuilder_s_nutrition_book_franco_columbu.pdf
    • https://cdn.shopify.com/s/files/1/0447/3815/0549/files/oxford_bookworms_stage_3_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/tawuduzonoxijiwitolefedab.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/xizegivogafewi.pdf
    • https://cdn.shopify.com/s/files/1/0462/5652/1367/files/bittorrent_mac_os_x_10._4_11.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/doditumugesaxum.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/23239182555.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8829/files/introductory_chemistry_nivaldo_tro_5th_edition.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_off00009798.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9798 2828 bytes
font_01_sfnt_off0000a193.bin
cb0b8a1cab844592f593c6ba51d55b69a732f60e54360484c59ddd8adcff0c24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA193 5484 bytes
font_02_sfnt_off0000b45c.bin
fe79679413dc9413491e912d9d9ed88e1d1abdf5a67d8ab404b8ff42cdf9e50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB45C 9964 bytes

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