Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5e3aef0bca082b…

MALICIOUS

PDF

33.3 KB Created: 2020-09-09 02:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97906aeb0e3856a8336a0aa2f94f8fb8 SHA-1: cd80de89b07136da1cdad4f61042184efcf92fff SHA-256: fd5e3aef0bca082b5d03a4d6809809142e977521db50cbadc4018b422a1a268b
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or redirection attack aimed at leading the user to malicious content.

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.cc/wix?keyword=icao+aerodrome+design+manual+part+6+pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1278/files/web_browser_android_tv_apk.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/cervical_radiculopathy_neck_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/weather_today_in_ridgecrest_ca.pdf
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/ielts_writing_task_1_topics_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5159/7480/files/adele_weight_loss_2014.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_7e77b623e97b466baf5441f88ae0431b.pdf
    • https://static.usrfiles.com/ugd/5a4c69_1cf1cfe8368a4bcdbfb1c6e4203f174d.pdf
    • https://static.usrfiles.com/ugd/73c254_912b1eb3f764423aa4ac0288596c9f2b.pdf
    • https://static.usrfiles.com/ugd/338562_e35d1c2ea881447daddf87eb38602df0.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/workday_hcm_training.pdf
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/thieme_atlas_of_anatomy_head_and_neuroanatomy.pdf
    • https://cdn.shopify.com/s/files/1/0435/6089/4627/files/puwakabazejitupis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/how_to_use_carstream_android_auto.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/2782131509.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_off000045ba.bin
9affb42e95488f3f3eaae9316e6783545dcfb6c389c6b8d7b7d1c874ec4f31bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45BA 5564 bytes
font_01_sfnt_off00005897.bin
e4d93a646181a9ad88cc64957effeafd55eda04a6902c1e66dd2e5283d8712b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5897 9320 bytes

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