Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda1573d5b4aedff…

MALICIOUS

PDF

43.9 KB Created: 2020-09-10 07:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d43e32be4c9058e49c7e783eebdd1b SHA-1: 5ada82c3dabd955b3c028fdd3a7d5193c0e7d16e SHA-256: eda1573d5b4aedff75af098acba3d7320b67efa205b6da3ab73a15fb2ed7476e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.link/wix?keyword=bitcoin+miner+apk+pro`. This URL is presented within the document body, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on `cdn.shopify.com`. The ML classifier strongly supports the malicious nature of this 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.link/wix?keyword=bitcoin+miner+apk+pro
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/agregado_miudo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/destiny_child_game_pc.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/korukadibadatigu.pdf
    • https://cdn.shopify.com/s/files/1/0439/9398/9278/files/anker_soundcore_mini_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8487/3879/files/nujosukosoben.pdf
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/c2_exponentials_and_logarithms_worksheet_d_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/kodazawizomi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/14208740564.pdf
    • https://static.usrfiles.com/ugd/4ae4db_23857cbbf79f4721b150f09b34998ff8.pdf
    • https://static.usrfiles.com/ugd/8c2e83_e2c9d7e36431466cba79c47ab148bfae.pdf
    • https://cdn.shopify.com/s/files/1/0436/7224/0293/files/k5_learning_english_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/kosinowojaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/77010551444.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/dark_souls_2_twinkling_titanite.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_off00006e9f.bin
b06cefff2ad44d008e08f09b6ea9f5058c00c15c2ab6b2ed0de1125f8b697c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 4984 bytes
font_01_sfnt_off00007f7e.bin
a7244ca0d61e761e3f7010f3f43b424ee68f82de1e813314101a3b52de322805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7E 10340 bytes

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