Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99b39a8e746cf2b…

MALICIOUS

PDF

40.3 KB Created: 2020-09-02 23:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87a45ef7d8d299cd3cbaa30b2922940 SHA-1: 516f7f99708fdf59c4cff1ea784a56f406e4277f SHA-256: a99b39a8e746cf2b97f289628d4e741232820bd63d32514b47f40b31280a9335
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to a malicious redirector. The primary malicious URL identified is ttraff.link, which is known for redirecting to malicious content. The document body contains obfuscated text and URLs, including the malicious redirector and several Shopify-hosted PDFs, suggesting a lure to a malicious site.

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=f+and+ec+ka+full+form
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/5045810480.pdf
    • https://cdn.shopify.com/s/files/1/0434/1373/3534/files/happy_birthday_song_pagalworld_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/85536550368.pdf
    • https://cdn.shopify.com/s/files/1/0437/7611/4837/files/tobufuloda.pdf
    • https://static.usrfiles.com/ugd/b9801a_6f0c4f1a592c4d328ee6a24b9a437019.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9e4d317237c4a8abd64382f6cff5931.pdf
    • https://cdn.shopify.com/s/files/1/0430/1497/9737/files/35513238734.pdf
    • https://cdn.shopify.com/s/files/1/0465/0618/0758/files/sumuwep.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/chemistry_practical_book_for_class_11_cbse_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8541/files/effects_of_global_warming.pdf
    • https://static.usrfiles.com/ugd/55cc32_d0e829d465c54d5ebf50d8a44f64190f.pdf
    • https://static.usrfiles.com/ugd/3d0627_d05c090de6cf4a2894709988a91ffcb1.pdf
    • https://static.usrfiles.com/ugd/145364_6410f83623744c148246602c85ee47b3.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_off000060a9.bin
d0ef2de629051be8d106c1a4b7e9b5054002cfb422cd6646e3a42f7d2ce32dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A9 5008 bytes
font_01_sfnt_off000071a8.bin
57f7d8dadf82f67d3d402cad10adb37cdb9cf166b95947896ffdbdada5b16b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A8 10264 bytes

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