Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdea17b9ace9cf24…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 14:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c199df638548726b16083b9f8da570a2 SHA-1: eb720d42da624081cc71b2135b18118936d98741 SHA-256: fdea17b9ace9cf24058b0168e244254177291de1878587db8ecb9e6e4e8a270b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is designed to lure users with a keyword search for 'igcse biology past papers 2020 pdf', likely as a pretext to deliver a malicious payload. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to distribute malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=igcse+biology+past+papers+2020+pdf
    • http://files.sunvalleystudio.com/uploads/1/3/2/7/132741029/libuxege.pdf
    • http://files.dragongoldcup2020.com/uploads/1/3/1/4/131453393/norewanepuxes_taposux_gumasizot_potavovisi.pdf
    • http://files.tewksburybaptists.org/uploads/1/3/0/8/130814252/zoduxu-wigifafom.pdf
    • http://files.indiracreative.com/uploads/1/3/1/3/131379306/4196546.pdf
    • http://busoxemar.3queenspublish.com/uploads/1/3/2/6/132683014/vaguwesewir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/7134877073.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/megaloblastic_anemia_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0440/3481/8198/files/fifaruwebamafesadit.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6161/files/capacitive_sensor.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/84926254455.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39806276645.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/brain_on_fire_libro_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3797/files/chrome_extension_message_passing.pdf
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/gt_walsheim_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/lijupisofeluguko.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/orbital_mechanics_and_astrodynamics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/fuvawokijojavo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f1f.bin
ed5326ae793b2713b20722ea4c4437412762fda49156d8172e346da067456364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1F 5460 bytes
font_01_sfnt_off000061b5.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 1800 bytes
font_02_sfnt_off00006a43.bin
4e4ab3b59525e00651fb4664b55f4bf105591f62ef530a01bc5911bdc3ffff0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A43 10000 bytes
font_03_sfnt_off00008c6c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6C 4324 bytes

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