Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e42f8e51491c616…

MALICIOUS

PDF

59.5 KB Created: 2020-08-31 13:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a477ea384600285e22408f998c57ca97 SHA-1: 611f82b760084fcc99256d52e66561c0a3ecd986 SHA-256: 1e42f8e51491c616f1690b58abc1fc4a1518d89152781f5aa26c736d2dcc62ee
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=200+chart+pdf'. This URL is likely used to direct users to malicious content. The document body, though heavily obfuscated, contains references to '200 chart pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous embedded links further supports the link farm heuristic.

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/wix?keyword=200+chart+pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2975/files/abecedario_para_colorear_con_dibujos.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/dikirususojibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0147/0366/files/vimaneze.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7061/files/as_etapas_do_pensamento_sociolgico.pdf
    • https://static.usrfiles.com/ugd/70c1f8_6fe673cb5fd34a8cacd452ddcb8d8dee.pdf
    • https://static.usrfiles.com/ugd/158fb9_8ca358998844491c9d83f050d73ed328.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_1c273f8e6d5b4d94b27ab2fabaeebcea.pdf
    • https://static.usrfiles.com/ugd/fd30ac_e48aaf2723c944979207192127530f6a.pdf
    • https://static.usrfiles.com/ugd/97493d_b68ae4ce25594f219191846483b25ece.pdf
    • https://static.usrfiles.com/ugd/22bf55_edf41b3c5933416db2d2f98daa405a6c.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_41a1b635f4b6400bbd31e373e069b68c.pdf
    • https://static.usrfiles.com/ugd/f8de3e_c21f3cce7a0f4aa4823b853b41a2d6e4.pdf
    • https://cdn.shopify.com/s/files/1/0447/8962/9085/files/aashiqui_2_songs_lyrics_free.pdf
    • https://cdn.shopify.com/s/files/1/0457/8505/5398/files/aadat_song_by_sucha_yaar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5397/2630/files/mudisefapunojo.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_off00009ba1.bin
f2185e9ce8c3851f4bf3ccc549ae192dfd8d8b8fdc4e49af8e7424a7250ed263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA1 5212 bytes
font_01_sfnt_off0000ad59.bin
a60b790832db1f5084b4e3a58d910ac927369e91ee5489e35a161faa9a22142e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD59 17540 bytes

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