Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d4f8534379082f…

MALICIOUS

PDF

43.6 KB Created: 2020-08-15 00:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5230ef28756da43d4698eecc50ee1509 SHA-1: 82f5e9ba2538a91173ecaa9281df02cee9de3969 SHA-256: 28d4f8534379082ff8447d24a1d595cfbe10ce7e46390580484a7c9b8f7f3c75
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.com/wb?keyword=islamic%20baby%20boy%20names%20in%20urdu%20with%20meanings%20pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The file was generated by wkhtmltopdf, which can be abused to create malicious PDFs.

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/wb?keyword=islamic%20baby%20boy%20names%20in%20urdu%20with%20meanings%20pdf
    • http://robot.citramesinsby.net/uploads/1/3/2/6/132682076/xovatej_mijovareradoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/cactaceae_opuntia.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/28180061698.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/jomuta.pdf
    • https://cdn.shopify.com/s/files/1/0434/6714/5366/files/21142808129.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/xodololenaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/5549660805.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xarapidarobumebavo.pdf
    • https://cdn.shopify.com/s/files/1/0448/3589/7505/files/vagabat_gita_bengali_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1416/files/mosfet_differential_amplifier.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/75954294267.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25346701784.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_off00006197.bin
acd0972e8ab8749a904f1761eb7580af0dc6349983eebda757f9a60bf853a442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6197 5840 bytes
font_01_sfnt_off00007557.bin
7742f958501d1d8132dd44f1ee5a0d7879603cafdc2d1062e7c40316f9309b3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 14288 bytes

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