Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d11786e3f04f9b…

MALICIOUS

PDF

45.8 KB Created: 2020-08-23 01:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a02293f723d04cfc244d203e1c1350 SHA-1: 3d6514fea7efa601ed60d4148e1dd3eb34ac1c2c SHA-256: c9d11786e3f04f9b581683e5d7fdda7bf6af02fbb2d0ebcff3cb4daffd706998
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=simon+sinek+find+your+why+worksheet', which is likely the primary lure. The presence of numerous other PDF links, as noted by the 'PDF_SEO_LINK_FARM' heuristic, suggests a tactic to distribute malicious content or engage in SEO manipulation. No scripts were extracted, but the primary attack vector appears to be a malicious redirector embedded within the PDF.

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=simon+sinek+find+your+why+worksheet
    • http://files.artbysarabardin.com/uploads/1/3/0/7/130776602/gusimorutojemuro.pdf
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/69509964192.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/27321607449.pdf
    • https://cdn.shopify.com/s/files/1/0437/9512/0289/files/18785868959.pdf
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/underdog_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/winani.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9561/files/swgoh_darth_revan_gear_list_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/merge_files_with_adobe_acrobat_reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2156/files/47870125349.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/86010081954.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/cancer_de_prostata_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/descargar_libro_de_operatoria_dental_de_barrancos_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/7197849231.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/sodunesevikozaxov.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_off000075bb.bin
e9020c4cef5ce1a1277aec5b3bdcfc15d2f72b14ba51a90120e55d13b6b9ac20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BB 5264 bytes
font_01_sfnt_off00008788.bin
0ae73b65b36896ffd6da7e57f62363182f2ebd8ed04df2b6e0752be6d6933279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8788 10188 bytes

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