Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9312a24414f946a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 07:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00083b075910310b629c4e001f207048 SHA-1: 3600d36860c96ef468943b4c57497aeace9a6be1 SHA-256: d9312a24414f946af602d9347d0cc1192e94e453635037fee0ae9efbaf8588fd
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'. Additionally, it exhibits a PDF link farm with 28 external PDF links, many hosted on Shopify, suggesting an attempt at SEO poisoning or a large-scale phishing campaign. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links and the redirector strongly indicate a malicious intent to direct users to harmful 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.com/pify?keyword=comets+vs+asteroids+worksheet
    • http://files.mrsthompsonteaches.com/uploads/1/3/0/7/130739173/vukemoba.pdf
    • http://files.energiepositief.info/uploads/1/3/2/7/132712508/gofebopepapepu_fakedefu_pelemebasorug.pdf
    • http://files.fdryabc.com/uploads/1/3/2/6/132682833/wafisaweje.pdf
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/nordic_track_2550.pdf
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/56602139334.pdf
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/femimasojidoru.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/business_plan_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/bojomolaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/ir_2135ti_max.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/minebigulapimulotiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/waxigulazatep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/86967395743.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/88688995656.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/obstacle_avoiding_robot_using_ultrasonic_sensor_arduino.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_off000065ce.bin
289bc7dad3c58755971be7114027960aa3583bb9641908bd563e26d0c5c7b052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CE 5156 bytes
font_01_sfnt_off0000773d.bin
5760eb9bc11bf29d5af6376add69aa6027b778adb0fb37356c7015d9b7dc5370		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773D 10060 bytes

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