Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf51d88d6d791bf…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 03:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad5ad04af6553a66ee47dfdf51837a66 SHA-1: e06295e24039fb19c2fbb4f3a789120d5d8e5e29 SHA-256: 2bf51d88d6d791bf8dc000c5e7b91afe4176942a8085df74168e481b8383b3b2
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.cc'. The document body, though heavily obfuscated, contains the same malicious URL and a Turkish phrase that translates to 'questions and answers for the correct movement'. This suggests a social engineering lure to trick users into visiting the malicious site. The presence of numerous benign-looking Shopify URLs is likely a technique to blend in with legitimate traffic.

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=d%25C3%25BCzg%25C3%25BCn+do%25C4%259Frusal+hareket+sorular%25C4%25B1+%25C3%25A7%25C3%25B6z%25C3%25BCml%25C3%25BC
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/bandook_chalegi_song_ming.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/bosphorus_tour_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/12278459972.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/92946485677.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0466/8896/0676/files/biology_incomplete_and_codominance_w.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/beachbody_ultimate_reset_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/sample_teacher_lesson_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13002849425.pdf
    • https://cdn.shopify.com/s/files/1/0437/5347/2151/files/nutrisi_hidroponik_alami.pdf
    • https://cdn.shopify.com/s/files/1/0436/1283/1907/files/11329370117.pdf
    • https://cdn.shopify.com/s/files/1/0429/0736/9639/files/luwuturag.pdf
    • https://cdn.shopify.com/s/files/1/0433/9951/2231/files/59706294553.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/kamaposemulegup.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_off000044af.bin
f749e4930e91c10a274c5f64a051162fec8bfb60930c09154a6bc6b6392c2c39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44AF 6052 bytes
font_01_sfnt_off00005836.bin
16e128a4fe9df3045383e0fe3193a99d31264cbd8af252ac0aa5813f6329ec83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5836 10384 bytes

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