Malicious PDF — malware analysis report

Static analysis result for SHA-256 38524d4ec6d9bf68…

MALICIOUS

PDF

39.2 KB Created: 2020-08-19 04:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b5e768b9a1fd3c49ea5967f8df6e3ff SHA-1: 87c1237789eead1bd1f528d71721dd3a3d6b0584 SHA-256: 38524d4ec6d9bf68bebe4fafe3c2cc64841ad179b40a1820ce553170d6a111ff
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=button+script+google+sheets'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves tricking the user into clicking the malicious link, which likely leads to a phishing page or malware download.

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.cc/pify?keyword=button+script+google+sheets
    • http://jebaxa.franucci.com/uploads/1/3/0/7/130739433/b1e825713.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/lufifowex.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/pasar_de_a_word_gratis_y_rapido_en_linea.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/xudifebekinufezilulezemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pekuxiwitijumowiviw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/gebuzevelamesupufamel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/cartoonito_italia_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0450/3745/3470/files/divowagezeragixer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2261/files/87965465026.pdf
    • https://cdn.shopify.com/s/files/1/0443/6888/7964/files/79384651195.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/25805588648.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_off00005d38.bin
41195c4a03c64579e86b6e502c28a78deee085eda8468a47d857a809a4052086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D38 5032 bytes
font_01_sfnt_off00006e51.bin
d00d2a6f40687576c56ae9a5f0ed831afdcc6f6469dcdc1f2bdededaf8f5583e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E51 9976 bytes

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