Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7e953815980824…

MALICIOUS

PDF

39.6 KB Created: 2020-08-22 19:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bbbdf673a5b912cd3be4fb006173111 SHA-1: c9ca337bf08705eba6feacfa5db25a6dae4c0778 SHA-256: 7d7e95381598082440573827f05e7bbff52ba07fb15adde60a72f2eb8ea8df04
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link to a known malicious redirector. Another critical heuristic identified a PDF link farm with numerous external PDF links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.com/pify?keyword=hip+thrust+machine+form, which is likely used to redirect users to malicious content. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is driven by the extensive link farm.

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=hip+thrust+machine+form
    • http://files.thenutritionhutt.club/uploads/1/3/0/7/130739783/b4cc77fee8de86d.pdf
    • http://zemej.newentorchestra.org/uploads/1/3/0/8/130874493/pelexugetuvi_rumabivirasimoj_xirilone.pdf
    • http://jimafap.rezawood.com/uploads/1/3/2/6/132683014/jonebuwarabu.pdf
    • http://files.writeonyouth.com/uploads/1/3/0/7/130776646/8200704.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0613/files/82138041391.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/sitilasomodixo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2560/files/rozedirur.pdf
    • https://cdn.shopify.com/s/files/1/0437/8525/7112/files/facebook_messenger_video_call_not_working_android.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/99148800511.pdf
    • https://cdn.shopify.com/s/files/1/0431/0689/3985/files/brochure_interior_design.pdf
    • https://cdn.shopify.com/s/files/1/0430/9418/0001/files/shaun_t_cize_videos.pdf
    • https://cdn.shopify.com/s/files/1/0439/2756/8552/files/faxozil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/connect_bluetooth_keyboard_to_android_tv_box.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.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_off00005eef.bin
edd7ad479f5d2e700e75ed6ff76789399cc4f0050fdecd1e670d39db709995d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEF 5184 bytes
font_01_sfnt_off0000705d.bin
6665ba5c0aae70cad04118797e3f53f1efa1b45011ebb6397718dc8ddf59c81b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705D 9836 bytes

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