Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad7a34eacd48b52…

MALICIOUS

PDF

43.7 KB Created: 2020-08-15 02:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9920628ab62d4c224d2f7602e42788a0 SHA-1: 1fd081916465be1a4f2a09e394970425a73f4489 SHA-256: 1ad7a34eacd48b52e34d34689a69b9b4bbd64399ac2d69725a4bb6ba15a2c5a2
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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF filename, suggesting a lure. The primary attack vector appears to be social engineering via a deceptive link 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.com/pify?keyword=michelin+guide+california+2019+bib+gourmands
    • http://files.thegoldengoosecarvery.com/uploads/1/3/0/9/130969206/4301405.pdf
    • http://files.tilicho.fr/uploads/1/3/2/6/132681763/nikujevosuk.pdf
    • http://niropoxa.carlystong.com/uploads/1/3/2/8/132815180/4866e2f.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/92320934986.pdf
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/90370601258.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/wordly_wise_3000_book_8_answer_key_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/fopizegozemuguku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdf
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/dekalb_county_parks_and_recreation.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/kemuroz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/make_how_to_use_a_breadboard.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/12007742863.pdf
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/cambridge_english_for_the_media_student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/cardiomiopatia_dilatada.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.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_off00006a27.bin
0a0e9ef09a59e9c3c71559523f87ab63b0b00cd1ced75953b07c0fa8906eec47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A27 6060 bytes
font_01_sfnt_off00007e92.bin
3a3829cdca302a7f3f3fe3032620252956660fd8e70f80253510cec32d29acfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E92 10376 bytes

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