Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4b5a1d641695ca…

MALICIOUS

PDF

40.2 KB Created: 2020-09-17 01:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c075e9e60ce6ab0ff11926fdd9fa3549 SHA-1: a4efa731527df357872c3b4c7cb00bab99c246ec SHA-256: 9e4b5a1d641695ca65f5d896e47a43997db674172924cbe05e4c2d6f34796471
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links pointing to external PDF files hosted on various domains. One URL, 'https://ttraff.club/wix?keyword=acadiana+high+school', is identified as a malicious redirector. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through a network of seemingly unrelated documents. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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.club/wix?keyword=acadiana+high+school
    • http://files.willsphotographypa.com/uploads/1/3/1/3/131383837/fagerokuv.pdf
    • http://files.annishealinggarden.com.au/uploads/1/3/0/7/130776864/kuxafixogudaruwuje.pdf
    • http://files.paulomachadoart.com/uploads/1/3/2/6/132696598/wakiriwusepoxa_padosote_ramubofegigedu.pdf
    • http://files.malvernehslibrary.com/uploads/1/3/1/3/131397940/zapamifapamojosokoxe.pdf
    • http://tiguluju.nextbillionventures.com/uploads/1/3/1/3/131384609/4740784.pdf
    • http://nomago.jennygermann.com/uploads/1/3/2/3/132303052/fc50d1e3dd0de8.pdf
    • https://8140f1c4-ff12-4c08-ba61-3c40220d5eff.filesusr.com/ugd/954c8b_bf3eca9183274dee9b48e6fb9d02667a.pdf?index=true
    • https://fe739324-2664-4e0a-97e0-0ed75d107b4a.filesusr.com/ugd/f967ac_5e57b6149cff4bbbb0ed81465da73412.pdf?index=true
    • https://061ef07f-4b98-4765-83c1-628e5dddf232.filesusr.com/ugd/31bf02_a747fb899e7348659ae61b4a6bcbe9ac.pdf?index=true
    • https://75b9acc3-c63a-4a32-a942-5c3fdbdba6b8.filesusr.com/ugd/dcf311_a066ae2c3157487b9798d966e9b46a5c.pdf?index=true
    • 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_off0000601f.bin
64b9460864c26cd3e787ffce56bd1e213aa2067f4d72e7d64f1489f9753bc133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601F 5092 bytes
font_01_sfnt_off00007173.bin
1ba44d3a02342f0436a5c3e7695c2056d2a7be08d08a97197c16c47fc104325c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7173 10316 bytes

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