Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6c23fae8fd6352…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 02:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba5267064aae2722a642ee9ca3299fc9 SHA-1: fa0b7f95c60fc07a1aaa0f3d7d33154a825065a8 SHA-256: ce6c23fae8fd635222eb7821b6b540560364ea08e84840bfe6378ff97dc7b6b1
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'simple alarm clock app android free' and the malicious URL. This suggests a social engineering lure to trick users into clicking the link, which then redirects to malicious infrastructure. No scripts were extracted, limiting the analysis of further payload delivery.

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=simple+alarm+clock+app+android+free
    • http://files.tarrantscn.org/uploads/1/3/1/4/131407112/vulavigubu-jekitevaduboje-jizetuxelujoxa-zobafumefuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/31588878768.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/14821471943.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/25316447866.pdf
    • https://cdn.shopify.com/s/files/1/0429/5321/2060/files/94601260022.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/assessment_of_communication_and_interaction_skills_acis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/22012077630.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3298/files/free_blank_t_shirt_mockup.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/milivomifupudonavupajok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/garmin_montana_680t_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/83680781591.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_off00006c5a.bin
2a7621af91e91120f971c9b0ede1379233d46143d3a82a81fe73cedb76f48298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5A 5288 bytes
font_01_sfnt_off00007e35.bin
c87daa735b511580cf90069cfcaa8f6d2cf08b31b85dc002d3fb2e95bdcce002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E35 10344 bytes

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