Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43c9824a62d45c7…

MALICIOUS

PDF

39.6 KB Created: 2020-08-23 20:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4748b1d3c75e18f65d8c58f99b55d2bf SHA-1: eab4291f5b7e8d508596869cc17e6e5059aa3560 SHA-256: b43c9824a62d45c7d29f6e17a2b0bdc04ec5f39cad18945a28e737329558eaa6
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=autoestima+pdf+autores'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being to a Shopify domain. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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=autoestima+pdf+autores
    • http://files.theconfidencefactorforwomen.com/uploads/1/3/1/3/131383581/kulemote.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/51725603442.pdf
    • https://cdn.shopify.com/s/files/1/0443/5968/0156/files/printable_for_sale_sign_car_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/41827107146.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/zunupotejufuregetajum.pdf
    • https://cdn.shopify.com/s/files/1/0439/3297/5272/files/defisozadikurazevazo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/p90x_nutrition_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/22509719435.pdf
    • https://cdn.shopify.com/s/files/1/0435/8864/9123/files/badodedonivumonavesepugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/wureridopilekiri.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/pulsar_150_hd_pic.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/bawelomorazolopobudipu.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_off00005e16.bin
10bf30bf42a957bb5fee751723d61f46ceac086db9a700488a7ad2ed4f8cc1d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 5144 bytes
font_01_sfnt_off00006f7a.bin
a877e9447bcc3f03bb48cfd7f0f063786c920f803b72347877016d8e848d76b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7A 10076 bytes

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