Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa41e4eb2ed865d2…

MALICIOUS

PDF

54.1 KB Created: 2020-09-16 15:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dcf26afaa5b1a0a98f57827df43730d SHA-1: dad42024eb0943a27e08edc96f79315cc41c88c5 SHA-256: aa41e4eb2ed865d23848c017157e82907124cd335bff36e32b18075ea03aee86
120 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, directing users to 'https://ttraff.club/wix?keyword=cuaderno+mas+practica+answers'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which are to benign-looking PDF files hosted on services like filesusr.com and shopify.com, likely for SEO manipulation or to obscure the malicious link. The document body, though heavily obfuscated, contains the malicious URL and other URLs that appear to be part of a link farm. No scripts were extracted from this sample.

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.club/wix?keyword=cuaderno+mas+practica+answers
    • http://fatovemu.nihc.ca/uploads/1/3/2/6/132683138/pezofugamokuk-fabipa-puzejulagog.pdf
    • http://kakowudi.stainlesssteelstaysbeautiful.com/uploads/1/3/2/7/132712358/615c65ac.pdf
    • https://5b7c1fcd-8081-4a44-ab70-bd43bbb34245.filesusr.com/ugd/b7306e_cec8d7ea8d184ff49e24233176e5b6ad.pdf?index=true
    • https://9f38e598-0eb6-4ab4-b425-6297cbffd2b3.filesusr.com/ugd/33ab24_acceefce51404c91b79c8c3a8bb9fb81.pdf?index=true
    • https://6bd85d16-c574-4b08-8925-8ffd64b1ef68.filesusr.com/ugd/dc8a8e_39c1c306146f4aabade5f0c2057e1f6d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/4784/4000/files/kowetodogozosoworij.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3951/files/operaciones_basicas_de_matematicas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/95510749047.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_off0000903b.bin
69c1ae03eb48f0ad5e392d8c762676a780071418bdc4762528c6a2b154ff1739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x903B 5184 bytes
font_01_sfnt_off0000a1d2.bin
8a38a0af2a27626f04e1080d33a1691ef7bb79de0a1a68500767e1cc298baf6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D2 13136 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.