Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70053ee4ed4fbbf…

MALICIOUS

PDF

42.9 KB Created: 2020-09-03 17:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24701c2642bc1d10f48532d15c56459 SHA-1: f1d38707dadcc5a97fa40cdd34cf2a3caa3d2a08 SHA-256: b70053ee4ed4fbbfb300042c2cacf2e37746d7032c57346ae0085fa7dceab800
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 'ttraff.club'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be luring the user to the malicious URL.

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.club/wix?keyword=sheetrock+abuse+resistant+gypsum+panels
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/65349580322.pdf
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/1724024257.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/menikojukuvemejikipaxalaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3022/3775/files/pedilabegos.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/28077287194.pdf
    • https://cdn.shopify.com/s/files/1/0432/8957/5588/files/83161825281.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/bosch_dishwasher_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9075/6259/files/bsc_1st_year_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/risemanukubusezalajelemu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7428/8793/files/how_to_make_a_branch_in_github.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/aquaristik_magazin.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/
    • https://cdn.shopify.com/s/files/1/0435/30

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006804.bin
97a01f919cedffebbbd60e7e92e927fff520977eeac9440cea5efded0031e1d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6804 5756 bytes
font_01_sfnt_off00007b7c.bin
39a774bdd0c44e2c699ebbcd2dcc1d98542b1cf4dfa04e56c46d096ae11cd228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 10276 bytes

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