Malicious PDF — malware analysis report

Static analysis result for SHA-256 3287c4e2acce7a24…

MALICIOUS

PDF

41.1 KB Created: 2020-08-18 23:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1335d0dbc12ba529be964134a2252e5 SHA-1: 213fba78ffa08528c9b9b8ef56b6521c5372abdd SHA-256: 3287c4e2acce7a24cf5a1ca22f01bef00ec29cba7e3dc2fa31edab7db65a28a9
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and references Excel formulas, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to distribute the malicious content.

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.com/pify?keyword=arrondir+une+formule+excel
    • http://zutof.cgevry.com/uploads/1/3/0/8/130813694/1306483.pdf
    • https://cdn.shopify.com/s/files/1/0450/9057/0405/files/world_currency_symbols_with_country_name.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/australian_dental_association_infection_control_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/shakugan_no_shana_characters.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7837/files/a_dozen_a_day_mini.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/adobe_scan_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/84614213199.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/45631881917.pdf
    • https://cdn.shopify.com/s/files/1/0431/8887/9521/files/kafevevekafavifi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/pseudo_denys_l_aropagite.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/52555004017.pdf
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/osama_bin_laden_song.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_off00005f13.bin
f09a73d7e8e2696c9b357763dbf9d985e858acdea0cd9ecce9e1828b8d510f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F13 4836 bytes
font_01_sfnt_off00006f67.bin
4150f9086f3e7e90450525a6cf8619ea04b4cfd4f69abf4cfb04876096913c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 12080 bytes

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